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A UNITED STATES * DEPARTMENT OF ^COMMERCE PUBLICATION
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Voluntary
Product
withdrawn Standard
University of Illinois Library	PS 34-70
Urbana-Champaign
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U.S. DEPARTMENT OF
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National ^ Bureau pPf Standards
URBANA, ILLINOIS S1BOI
26 1971
Fluorinated Ethylene-Propylene
(FEP)
Plastic Lined Steel Pipe and Fittings
SITY OF ILLINOIS na-champaign
A Voluntary Standard Developed by Producers, Distributors, and Users With the Cooperation of the National Bureau of Standards
For sale by the Superintendent of Documents U.S. Government Printing Office, Washington, D.C. 20402. (Order by SO Catalog No. 013.20/2:34-70), Price 10 cents.
UNIVERSITY OF ILLINOIS-URBANA
3 01
12101
590237Voluntary Product Standard (PS 34-70)
Fluorinated Ethylene-Propylene (FEP) Plastic Lined Steel Pipe and Fittings
noj£c 'ft*. *1D* f-
Technical Standards Coordinator: L. H. Breden
Abstract
This Voluntary Product Standard covers requirements and methods of test for the material, dimensions, construction, and performance of commercially available steel pipe and fittings lined with fluorinated ethylene-propylene (FEP) plastic intended to be used for conveying acids, gases, solvents, and other corrosive materials.
Key words: FEP lined pipe; fluorinated ethylene-propylene plastic lined pipe; pipe and fittings, steel, plastic lined; plastic lined steel pipe; steel pipe and fittings, plastic lined.
Nat. Bur. Stand. (U.S.), Prod. Stand. 34-70, 12 pages (Mar. 1971) CODEN: XNPSACONTENTS
Page
1.	Purpose ______________________________________________________
K
2.	Scope and Classification_______________________________________
2.1.	Scope____________________________________________________
»	2.2. Classification ______________________________________________
2.2.1.	Pressure-temperature rating ____________________________
»	2.2.2. Size ____:______________________________________________
3.	Requirements_________________________________________________
*
*	3.1. General __________________________________________________
*	3.2. Linings _____________________________________________________________________________________2
3.2.1.	Material ___________________________________________________________2
^ 3.2.2. Tensile and elongation_____________________________________2
3.2.3.	Specific gravity________________________________________________________________________________2
>	3.2.4. Wall thickness__________________________________________________________________________________2
3.2.5. Flare (lap face) outside diameter________________________________________________4
^	3.3. Pipe and fittings_________________=_________________________4
*	3.3.1. Material_______________________________________________4
x 3.3.2. Finish _____________________________________________________4
3.3.3.	Tolerances____________________________________________________________4
3.3.4.	Flange construction__________________________________________________________________________4
3.3.5.	Venting __________*________________________________________________________________________5
a 3.3.6. Gaskets -_______________________________________________________________5
3.4. Lined pipe and fittings____________________________________________________5
L 3.4.1. Continuity_______*__________________________________________________5
3.4,2. Temperature and pressure______________________________________________________________6
3.4.3. Steam and cold water______________________________________________________________________6
3.4.4. Workmanship__________________________________________________________6
4. Inspection and Test Procedures____________________________________________6
4.1.	General ________________________________~__________________________________6
4.2.	Inspection_____________________________*__________________________________6
4.3.	Tests ________________________________________________________________________________6
4.3.1.	Electrostatic or hydrostatic testing_______________________________________6
4.3.2.	Temperature and pressure test_______________________________________________7
4.3.3.	Steam and cold water cycling test________________________________________________7
6. Marking ____________________,___________________.________________________8
6.	Identification _________-_______*_______________________________________8
7.	Effective Date____________________________________________________________________8
8.	History of Project__-____________________________________________________________________________8
w 9. Standing Committee ______________________________________________________________________________________9
10. Acceptors ________________________________________________________________________________________________________10
W
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►
«■>VOLUNTARY PRODUCT STANDARDS
Voluntary Product Standards are standards developed under procedures established by the Department of Commerce (15 CFR Part 10, as amended, May 28, 1970). The standards may include (1) dimensional requirements for standard sizes and types of various products, (2) technical requirements, and (3) methods of testing, grading, and marking. The objective of a Voluntary Product Standard is to establish requirements which are in accordance with the principal demands of the industry and, at the same time, are not contrary to the public interest.
Development of a VOLUNTARY PRODUCT STANDARD
The Office of Engineering Standards Services of the National Bureau of Standards has been assigned by the Department of Commerce the responsibility to work closely with scientific and trade associations and organizations, business firms, testing laboratories, and other appropriate groups to develop Voluntary Product Standards. The Bureau has the following role in the development process: It (1) provides editorial assistance in the preparation of the standard; (2) supplies such assistance and review as is required to assure the technical soundness of the standard; (3) acts as an unbiased coordinator in the development of the standard; (4) sees that the standard is representative of the views of producers, distributors, and users or consumers; (5) seeks satisfactory adjustment of valid points of disagreement; (6) determines the compliance with the criteria established in the Department’s procedures cited above; and (7) publishes the standard.
Industry customarily (1) initiates and participates in the development of a standard; (2) provides technical counsel on a standard; and (3) promotes the use of, and support for, the standard. (A group interested in developing a Voluntary Product Standard may submit a written request to the Office of Engineering Standards Services, National Bureau of Standards, Washington, D.C. 20234.)
A draft of a proposed standard is developed in consultation with interested trade groups. Subsequently, a Standard Review Committee is established to review the proposed standard. The committee, appropriately balanced, includes qualified representatives of producers, distributors, and users or consumers of the product being standardized. When the committee approves a proposal, copies are distributed for industry consideration and acceptance. When the acceptances show general industry agreement, and when there is no substantive objection deemed valid by the Bureau, the Bureau announces approval of the Voluntary Product Standard and proceeds with its publication.
Use of a VOLUNTARY PRODUCT STANDARD
The adoption and use of a Voluntary Product Standard is completely voluntary. Voluntary Product Standards have been used most effectively in conjunction with legal documents such as sales contracts, purchase orders, and building codes. When a standard is made part of such a document, compliance with the standard is enforceable by the purchaser or the seller along with other provisions of the document.
Voluntary Product Standards are useful and helpful to purchasers, manufacturers, and distributors. Purchasers may order products that comply with Voluntary Product Standards and determine for themselves that their requirements are met. Manufacturers and distributors may refer to the standards in sales catalogs, advertising, invoices, and labels on their product. Commercial inspection and testing programs may also be employed, together with grade labels and certificates assuring compliance, to promote even greater public confidence. Such assurance of compliance promotes better understanding between purchasers and sellers.Voluntary Product Standard PS 34-70
•a
Fluorinated Ethylene-Propylene (FEP) Plastic Lined Steel Pipe and Fittings
Effective September 1, 1970 (See section 7.)
*	(This voluntary Standard, initiated by The Society of the Plastics Industry,
*	Inc., has been developed under the Procedures for the Development of Volun-
►	tary Product Standards, published by the U.S. Department of Commerce.
See Section 8, History of Project, for further information.)
1.	PURPOSE
The purpose of this Voluntary Product Standard is to establish
nationally recognized dimensions and quality and performance requirements for commercially available integrally flanged pipe and fittings lined with fluorinated ethylene-propylene (FEP) plastic. This Standard is intended to provide producers, distribu-^ tors, and users with a basis for common understanding of the characteristics of this product.
2.	SCOPE AND CLASSIFICATION
2.1.	Scope—This Voluntary Product Standard covers require-ments and methods of test for the material, dimensions, construc-
^ tion, and performance of commercially available steel pipe and W fittings lined with FEP plastic intended to be used for conveying acids, gases, solvents, and other corrosive materials. Methods of marking to indicate compliance with this Standard are included.
2.2.	Classification
2.2.1.	Pressure-temperature rating—This Standard covers pipe and fittings produced in two series: one based on the rated working pressure of 150 psi and one based on the rated working pressure of 300 psi. The FEP resin used in the liner has a maximum heat stability temperature of 204 °C (400 °F); however, the maximum operational range of the liner may be less than this temperature and is dependent on the type of material in contact with the inner surface of the liner, mechanical considerations, the pressure, and ^	the temperature. Therefore, the manufacturer shall be consulted
\ regarding chemical, pressure, temperature, and vacuum ratings. 4	2.2.2. Size—This Standard covers pipe and fittings in the
following sizes:
*
Nominal inside diameter
		inch	2	inches	5	inches
	%	inch	21/9 inches		6	inches
•f	1	inch	3	inches	8	inches
	W2	inches	4	inches	10	inches
					12	inches
3.	REQUIREMENTS
3.1.	General—All products represented as complying with thisVoluntary Product Standard shall meet all of the requirements listed herein and shall be marked as specified in section 5.
3.2.	Linings
3.2.1.	Material—The linings shall be made from fluorinated ethylene-propylene resins conforming to the requirements of the American Society for Testing and Materials (ASTM) D 2116-66, Standard Specification for FEP-Fluorocarbon Molding and Extrusion Materials,1 except that a maximum of 1 percent by weight of additives is permissible for identification or other purposes. Organic additives, if used, shall be identified in the manufacturer’s specifications.
3.2.2.	Tensile and elongation—The lining shall have a minimum tensile strength of 2700 psi and a minimum elongation of 240 percent when tested in accordance with the requirements of ASTM D 638-68, Standard Method of Test for Tensile Properties of Plastics.1 The minimum values for tensile strength and elongation shall apply to both the longitudinal and the circumferential directions. When the size of the liner does not permit the selection of test specimens conforming to the sizes required in ASTM D 638-68, both the longitudinal and the transverse test specimens shall be prepared in accordance with ASTM D 1708-66, Standard Method of Test for Tensile Properties of Plastics by Use of Microtensile Specimens1
3.2.3.	Specific gravity—The linings shall have a minimum specific gravity of 2.14 when tested in accordance with the requirements of ASTM D 792-66, Standard Methods of Test for Specific Gravity and Density of Plastics by Displacement1
3.2.4.	Wall thickness—The linings shall have a minimum wall thickness of 0.050 inch, and the flared gasket faces shall be not less than 0.040 inch in thickness when tested in accordance with the requirements of ASTM D 2122-70, Standard Method of Determining Dimensions of Thermoplastic Pipe.1
Table 1. Specifications for steel pipe and fittings
Nominal pipe size	Minimum flare diameter
inches	inches
%	1%
%	1%8
1	1%
1%	2%
2	3%e
2y2	3i%e
3	4%
4	515/16
5	7%0
6	8
8	10^6
10	12 y4
12	14 y2
1 Later issues of all ASTM publications referenced in this Standard may be used providing the requirements are applicable and consistent with the issue designated. Copies of ASTM publications are obtainable from the American Society for Testing and Materials. 1916 Race Street, Philadelphia, Pa. 19103.Table 2. Specifications for steel pipe and fittings
Pipe section	Material	Specifications3		
Piping	Carbon steel Stainless steel	ASTM ASTM ASTM ASTM ASTM ANSI	A53-69a A160-68 A135-69 A587-68 A312-70 B36.19-65	Welded and seamless steel pipe (Types E and S) Seamless carbon steel pipe for high-temperature service Electric-resistance-welded steel pipe Electric-welded low-carbon steel pipe for the chemical industry Seamless and welded austenitic stainless steel pipe Stainless steel pipe
Flanges	Ductile iron Forged steel Stainless steel Ductile iron Stainless steel	ASTM ASTM ASTM ASTM ASTM ASTM ASTM ASTM ASTM	A395-70 A445-70 A536-70 A181-68 A182-69 A395-70 A445-70 A351-69 A389-68	Ductile iron for pressure containing castings for use at elevated temperatures (60-45-15) Ferritic ductile iron castings for valves, flanges, pipe fittings, and other piping components (60-40-18) Ductile iron castings (60-45-12) Forged or rolled steel pipe flanges, forged fittings, and valves and parts for general service Forged or rolled alloy-steel pipe flanges, forged fittings, and valves and parts for high-temperature service Ductile iron for pressure containing castings for use at elevated temperatures (60-45-15) Ferritic ductile iron castings for valves, flanges, pipe fittings, and other piping components (60-40-18) Ferritic and austenitic steel castings for high-temperature service Alloy steel castings specially heat treated for pressure containing parts suitable for high-temperature service
Fittings	Forged steel Cast steel	ASTM ASTM ANSI	A181-68 A216-70 B16.5-68	Forged or rolled steel pipe flanges, forged fittings, and valves and parts for general service Carbon-steel castings suitable for fusion welding for high-temperature service (Grade WCB) Steel pipe flanges and flanged fittings
a Later issues of all ASTM or ANSI publications in this table may be used providing the requirements are applicable and consistent with the issue designated. Copies of ASTM publications are obtainable from the American Society for Testing and Materials, 1916 Race Street, Philadelphia, Pa. 19103. Copies of ANSI publications are obtainable from the American National Standards Institute, oo 1430 Broadway, New York, New York 10018.3.2.5.	Flare (lap face) outside diameter—The outside diameter of the flare covering the gasket face portion of the flange or the full face of the lap-joint stub end shall not be less than the diameter specified in table 1. The flared portion of the lining shall be concentric with the flared portion of the pipe.
3.3.	Pipe and fittings
3.3.1.	Material—Prior to the installation of a venting system, the pipe and fittings, including flanges, fitting housings, and spacers, shall conform to the requirements of the appropriate specifications listed in table 2. The pipe shall be of welded or seamless steel, Schedule 40 or 80, except that Schedule 30 may be used for pipe with 8-inch and larger nominal size diameter. All sharp corners shall be removed by grinding or reaming to give a minimum radius of Ys inch.
3.3.2.	Finish—The outside surface of all finished pipe and fittings, other than stainless steel, shall be coated with a corrosion resistant primer of an epoxy or zinc phosphate chemical coating. Precaution shall be taken to avoid plugging vent holes. In addition, if cleaning of the vent holes is required, care must be taken to prevent damage to the liner. The interior surfaces of all pipe and fittings shall be clean and free of casting-mold burrs, rust, scale, or other protrusions which may affect the integrity or performance of the liner component.
3.3.3.	Tolerances—Tolerances shall be as specified in table 3. Centerline-to-face dimensions may be taken from the metal flange face or from the gasket face as indicated in the manufacturer’s specifications.
Table 3. Tolerances for pipe, flanges, and fittings
Pipe section		Tolerances
Pipe	Length Bolt-hole alinement Flange alinement (with theoretical pipe centerline)	inches ±y8 ±Vi& ±%4 for 6-inch-diameter pipe and over or ±V32 for pipe under 6 inches in diameter
Flanges	All dimensions	as specified in ANSI B16.5-1968
Fittings	All dimensions Flange perpendicularity (with theoretical pipe centerline at the flange outside diameter)	as specified in ANSI B16.5-1968 ±%4 for 6-inch-diameter pipe and over or ±%2 for pipe under 6 inches in diameter
3.3.4.	Flange construction
3.3.4.I.	Screw-type flanges shall be tack-welded to the pipe housing, or locked in position by other suitable means, before the pipe is lined to prevent inadvertent turning of the flange.3.3.4.2.	Slip-on and socket-type flanges shall be fully back-welded to the pipe housing before the pipe is lined. The inside surface of socket flanges shall be welded and ground smooth.
3.3.4.3.	Lap-joint and Van Stone types of flanged ends may be manufactured by standard forming techniques or by using fully-welded stub ends or collars. Lap joints shall not contain any cracks or buckles.
Note: Use of one Van Stone flange in each straight run of pipe in a piping system simplifies alinement.
3.3.5.	Venting—Each pipe or fitting shall be provided with a venting system which will release any gases that may be entrapped between the liner and the housing, and which will indicate any leakage through the liner. A vent hole system which provides adequate venting is described in 3.3.5.1, 3.3.5.2, and 3.3.5.3. Other systems which are safe and provide equal venting performance shall be acceptable under this Standard.
3.3.5.1.	Lined pipe—Each lined pipe is provided with vent holes of not less than Vl6 inch and not more than Vs inch in diameter in the pipe wall location as follows:
a.	Lined pipe over 72 inches long shall have two holes, 180° apart, located in back of each flange within 6 inches of the flange, and one hole located every 36 inches along the length of the pipe, rotated approximately 90° from the preceding hole.
b.	Lined pipe 36 to 72 inches long, inclusive, shall have two holes, 180° apart, located in back of each flange within 6 inches of the flange, and one vent hole in the approximate center of the assembly.
c.	Lined pipe between 18 and 36 inches in length shall have two holes, 180° apart, located in back of each flange within 6 inches of the flange.
d.	Lined pipe 18 inches or less in length shall have two vent
holes, 180° apart, located between flanges.
3.3.5.2.	Fittings—All fittings shall have two vent holes, 180° apart, located between the flanges; however, fittings employing split-type housings need not incorporate vent holes.
3.3.5.3.	Reducing flanges and reducers—A minimum of one vent hole is provided for reducing flanges. Standard and short tapered reducers shall have two vent holes, 180° apart, between the two flanges.
3.3.6.	Gaskets—A -inch-thick asbestos (or equal) backup gasket conforming to the requirements for Type 1, No. P 1161 A, of ASTM D 1170-62T, Tentative Specifications for Nonmetallic Gasket Materials for General Automotive and Aeronautical Purposes,2 shall cover the pipe and gasket face of the threaded flanges. Back-up gaskets are not required when the flanged metal face has an uninterrupted surface and a minimum internal bore radius of Ys inch.
3.4.	Lined pipe and fittings
3.4.1.	Continuity—All lined pipe and fittings shall show no evidence of pinholes, porosity, or cracks when tested in accordance with 4.3.1.
2 See footnote 1, page 4.3.4.2.	Temperature and pressure—The lined pipe or fittings shall show no longitudinal or radial cracks or distortion which would impair the function of the liner component when tested in accordance with 4.3.2. On the completion of this test, each of the tested specimens shall meet the requirements of 3.4.1.
3.4.3.	Steam and cold water—The lined pipe or fittings shall show no evidence of leakage through vent holes or other venting systems when tested in accordance with Procedure A or B of
4.3.3.	The liners shall show no evidence of buckling, cracking, or crazing during the test. Formation of surface water blisters shall not be cause for rejection. On the completion of this test, each of the tested specimens shall then meet the requirements of 3.4.1.
3.4.4.	Workmanship—The linings shall fit snugly inside the pipe and fitting housings. Scratches, dents, nicks, or tool marks on the surfaces of the lining shall not represent more than a 20 percent reduction in effective liner thickness or result in a minimum wall thickness of less than 0.050 inch. The gasket face portion of the lining shall be free of surface defects that would impair its effectiveness as a seal.
4.	INSPECTION AND TEST PROCEDURES
4.1.	General—The inspection and test procedures contained in this section are to be used to determine the conformance of products to the requirements of this Voluntary Product Standard. Each producer or distributor who represents his products as conforming to this Standard may utilize statistically based sampling plans which are appropriate for each particular manufacturing process but shall keep such essential records as are necessary to document with a high degree of assurance his claim that all of the requirements of this Standard have been met. Additional sampling and testing of the product, as may be agreed upon between purchaser and seller, is not precluded by this section.
4.2.	Inspection—The lined pipe and fittings shall be visually inspected to determine their conformance to the finish, design, and dimensional requirements of this Standard. End plates shall be replaced immediately after inspection is completed and should not be removed until installation.
4.3.	Tests
4.3.1.	Electrostatic or hydrostatic testing—The lined pipe and fittings shall be subjected to an electrostatic or hydrostatic test as described in 4.3.1.1 or 4.3.1.2. The test to be used shall be at the option of the manufacturer, unless otherwise specified by the purchaser.
4.3.1.1.	Electrostatic test—The test shall be performed with a nondestructive electrical coating-defect-tester. The output voltage shall be adjusted to 10,000 volts dc. A bronze scanning brush at this potential voltage, relative to the grounded lined pipe or fitting assembly, is moved through the interior of the component. Any leakage to ground is noted by the lighting of the neon indicator in the handle of the probe. A visible and audible spark, which occurs at the probe section when contact is made because of a defect in the liner, shall be cause for rejection. The surface of the component being tested must be clean and dry for effective results.4.3.I.2.	Hydrostatic pressure test—The internal test pressure A shall be 400 psi minimum, and the test shall be conducted in a temperature range of 20 °C to 30 °C (68 °F to 86 °F). The pipe and fittings shall be completely filled with clean water, and the k system shall be bled free of all air prior to the application of
*	pressure. Full test pressure shall be reached within 1 minute and maintained for an additional 3 minutes; the pressure shall then
*be reduced to zero, and the pipe and fittings shall then be subjected immediately to a second pressure cycle. The venting system in the pipe and fitting housings shall be observed throughout the t pressure test for evidence of leakage, which shall be cause for -^rejection.
*	4.3.2. Temperature and pressure test—Specimens of the lined pipe or fittings shall be assembled with suitable blind flanges
^having provisions for the introduction of compressed air. The specimens shall be subjected to internal air pressure equal to the
*	pressure rating of the pipe, but not less than 150 psi, while being . subjected to continuous heating in an oven for a minimum of 2 fcshours at 204 °C (400 °F). The specimens under internal pressure
shall then be cooled to room temperature, vented, examined for distortion and cracks in their linings, and subjected to the electro-r* static or hydrostatic test described in 4.3.1.1 or 4.3.1.2.
4.3.3.	Steam and cold water cycling test—The pipe or fittings A shall be subjected to steam and cold water cycling tests in accord-. ance with either Procedure A or B described below, fc 4.3.3.1. Procedure A—Specimens of the lined pipe or fittings
b,	shall be assembled with suitable blind flanges having fittings for ^ie introduction of steam, air, and cold water and for drainage, ^ch specimen shall be subjected to 500 steam-cold water cycling tests. Each cycling test shall be conducted as follows:
*	(1) introduce steam into the specimen, attaining an internal pressure of 125 to 150 psi within 3 minutes, and maintain this
*	pressure for a minimum of 3 minutes; (2) close off steam; (3) ^introduce air to get rid of the steam; (4) vent; (5) fill with water,
at a maximum temperature of 26.6 °C (80 °F), and allow to remain for a minimum of 3 minutes; and (6) drain completely. After completion of the 500 cycles, the specimens shall be cooled *to room temperature, and the liners shall be examined for evidence of buckling, cracking, crazing, or other characteristics indicative of malfunctioning. The dried lined pipe or fittings shall be subjected to the electrostatic or hydrostatic test described in 4.3.1.1 or 4.3.1.2.
i 4.3.3.2. Procedure B—Specimens prepared in accordance with Procedure A, shall be subjected to 100 steam-cold water cycling retests. Each cycling test shall be conducted as follows:
(1)	introduce steam into the specimen, attaining an internal ^pressure of 125 to 150 psi within 3 minutes, and maintain this
*	pressure for a minimum of 165 minutes; (2) close off steam; (3) ^introduce air to get rid of the steam; (4) vent; (5) drain for ^i/2 minute; (6) fill with water, at a maximum temperature of
26.6 °C (80 °F), and allow to remain for a minimum of 14 rminutes; and (7) drain completely. After completion of the 100 cycles, the specimens shall be cooled to room temperature, and *the liners shall be examined for evidence of buckling, cracking,crazing, or other characteristics indicative of malfunctioning. Formation of surface water blisters shall not be cause for rejection. The dried lined pipe or fittings shall be subjected to the electrostatic or hydrostatic test described in 4.3.1.1 or 4.3.1.2.
5.	MARKING	i
Marking on the pipe and fittings shall include the following: ^
(1)	The nominal pipe or fitting size
(2)	The type of plastic liner (FEP)
(3)	This Voluntary Product Standard designation,	4 PS 34-70 a
(4)	Manufacturer’s name (or trademark)	*
6.	IDENTIFICATION	*
In order that purchasers may identify products conforming to* all requirements of this Voluntary Product Standard, producers and distributors may include a statement of compliance in con- 4 junction with their name and address on product labels, invoices, sales literature, and the like. The following statement is suggested^ when sufficient space is available.
This fluorinated ethylene-propylene (or FEP) lined pipe / and these fittings conform to all of the requirements established in Voluntary Product Standard PS 34-70, developed cooperatively with the industry and published 1 by the National Bureau of Standards under the Proce- r dures for the Development of Voluntary Product Stand-ards of the U. S. Department of Commerce. Full w responsibility for the conformance of this product to the standard is assumed by ( name and address of producer > or distributor).
The following abbreviated statement is suggested when avail-, able space on labels is insufficient for the full statement:
Conforms to PS 34-70, (name and address of producer or distributor).	*
7.	EFFECTIVE DATE
The effective date of this Voluntary Product Standard is the J date upon which reference to the Standard may be made by pro-* ducers, distributors, users and consumers, and other interested parties. Compliance by producers with all of the requirements oiL this Voluntary Product Standard may not actually occur until' some time after its effective date. Products shall not be repre-w, sented as conforming to this Voluntary Product Standard until such time as all requirements established in the Standard are met. The effective date of this Standard is September 1, 1970.
8.	HISTORY OF PROJECT
'i
In May 1966, The Society of the Plastics Industry, Inc., requested the assistance of the Department of Commerce in estab-*lishing a Voluntary Product Standard for fluorinated ethylene-A propylene plastic lined steel pipe and fittings. A proposed draft of the Standard was developed, and in November 1969, the proposed Voluntary Product Standard was approved by the Standard ^Review Committee. In February 1970, public announcement was made, and the recommended Voluntary Product Standard was >widely circulated to the industry for acceptance. The response to this circulation indicated a consensus of acceptability within the ^industry as defined in the Procedures for the Development of Voluntary Product Standards. Accordingly, the Standard, designated as PS 34-70, Fluorinated Ethylene-Propylene (FEP) Plastic Lined Steel Pipe and Fttings, was approved for publication by the National Bureau of Standards to be effective September *1, 1970.
^Technical Standards Coordinator:
Leslie H. Breden, Product Standards Section ^ Office of Engineering Standards Services ^ National Bureau of Standards, Washington, D.C. 20234
9.	STANDING COMMITTEE
\ The individuals whose names are listed below constitute the membership of the Standing Committee for this Standard. The function of the committee is to review all proposed revisions and amendments in order to keep this Standard up to date. Comments
*	concerning this Standard and suggestions for its revision may be ^ddressed to any member of the committee or to the Office of k^engineering Standards Services, National Bureau of Standards, K Washington, D.C. 20234, which acts as secretary for the committee.
Representing Producers
T. Morena, Resistoflex Corporation, Woodland Road, Roseland, New Jersey 07068 (Chairman)
^ B. R. Murphee, John L. Dore, Inc., P. O. Box 36617, Houston, Texas 77036
^ J. M. Ayres, Dow Chemical Company, Technical Services and Development, P. O. Box 467, Midland, Michigan 48640 w Lester Keen, Raybestos-Manhattan, Inc., Manheim, Pennsylvania \ 17545
^	Representing Distributors
*	Phillip S. Penrose, Briggs Rubber Products Company, 203 ^ Churchill Drive, Wilmington, Delaware 19803
*	R. W. Fowler, R. W. Fowler & Associates, Inc., 400 Levy Road, ** Atlantic Beach, Florida 32003
F. Deane Langworthy, L M H, Inc., 2802 Tenth Street, Berkeley, r California 94710
j I. W. Phillips, Triplex Rubber and Supply Corporation, Box 10815, Houston, Texas 77018
*	9Representing Users
R. M. Ells, Humble Oil & Refining Company, P. 0. Box 551, Baton Rouge, Louisiana 70821 W. M, Cady, Jefferson Chemical Company, P. 0. Box 847, Port Neches, Texas 77651 L. R. Hays, U. S. Industrial Chemical Division, National Distillers and Chemical Corporation, Tuscola, Illinois 61953 F. X. Schoen, Union Carbide Corporation, Technical Center, P. 0. Box 8361, South Charleston, West Virginia 25303
10.	ACCEPTORS
The producers, distributors, users, and others listed below have individually indicated in writing their acceptance of this Voluntary Product Standard prior to its publication. The acceptors have indicated their intention to use this Standard as far as practicable but reserve the right to depart from it when necessary. The list is published to show the extent of recorded public support for this Standard.
ASSOCIATIONS (General Support)
National Association of Home Builders,	Society of the Plastics Industry, Inc., The,
Washington, D.C.	New York, New York
PRODUCERS
Dore, John L., Company, Houston, Texas	Resistoflex Corporation, Roseland, New Jersey
Fluorodynamics, Inc., Newark, Delaware	Shamban, W. S., & Company, Los Angeles,
California
DISTRIBUTORS, USERS, AND GENERAL INTEREST	j
Allied Chemical Corporation, Morristown,	Metcalf & Eddy, Inc., Boston, Massachusetts *
New Jersey	Modern Industrial Plastics Division, Dayton,
American Instrument Company, Silver Spring,	Ohio
Maryland	New York State Office of General Services,
American Standards Testing Bureau, Inc.,	Albany, New York
New York, New York	Omaha Testing Laboratories, Inc., Omaha,
B & B Plastics, Lockport, New York	Nebraska
Barclay, Ayers and Bertsch Company,	Oregon, State of, Salem, Oregon
Grand Rapids, Michigan	PPG Industries, Inc., Barberton, Ohio
Briggs Rubber Products Company, Wilmington,	Pennwalt Corporation, King of Prussia,
Delaware	Pennsylvania
Detroit Testing Laboratory, Detroit, Michigan	Penntube Plastics Company, Clifton Height,
Diamond Shamrock Chemical Company,	Pennsylvania
Cleveland, Ohio	Plastomer Corporation, Newtown,
Du Pont, E. I., De Nemours & Company, Inc.,	Pennsylvania
Wilriiington, Delaware	Prodorite, Ltd., Wolverhampton (Staffs)
Ferro Corporation, Bedford, Ohio	England
Glyco Chemicals, Inc., Greenwich, Connecticut	Raybestos-Manhattan, Inc., Manheim, Pa.
Gulf Research & Development Company,	Serck Audco Valve Manufacturers, Shropshire,
Pittsburgh, Pennsylvania	England
Hawaii, State of, Honolulu, Hawaii	Severna, Roseland, New Jersey
Hercules, Inc., Wilmington, Delaware	Sparta Manufacturing Company, Dover, Ohio
Hoffman-LaRoche, Inc., Nutley, New Jersey	Stone & Webster Engineering Corporation,
Horseley-Piggott (Coatings) Ltd.,	Boston, Massachusetts
Staffordshire, England	Titanium Metals Corporation of America,
Humble Oil & Refining Company, Baton Rouge,	Henderson, Nevada
Louisiana	Toni Company, The, St. Paul, Minnesota
Jefferson Chemical Company, Inc., Port Neches,	Triplex Rubber & Supply Company, Houston,
Texas	Texas
Jenkins Bros., Bridgeport, Connecticut	U. S. Industrial Chemicals Company, Tuscola,
Kay-Fries Chemicals, Inc., West Haverstraw,	Illinois
New York	Union Carbide Corporation, South Charleston,
L M H, Inc., Berkeley, California	West Virginia
Lakewood, City of, Lakewood, Ohio	Ventron Corporation, Beverly, Massachusetts
Lubrizol Corporation, The, Deer Park, Texas	Vulcan Materials Company, Wichita, Kansas
Lubrizol Corporation, The, Wickliffe, Ohio	Whitford Chemical, Franklin Park, Illinois
Merck & Company, Inc., Rahway, New Jersey	Wilkins, M. P., Supply Corporation, Toledo,
Ohio
FEDERAL GOVERNMENT
Agriculture, Department of, Washington, D.C. Interior, Department of, Washington, D.C. General Services Administration, Washington,
D.C.TO THE ACCEPTOR
The following statements answer the usual questions arising in connection with the acceptance of a Voluntary Product Standard and its significance:
1.	Enforcement—Voluntary Product Standards contain requirements which are established by mutual consent of those concerned in accordance with the Procedures for the Development of Voluntary Product Standards published by the Department of Commerce (15 CFR Part 10, as amended, May 28, 1970). The standards provide a common basis of understanding among producers, distributors, and users or consumers. The National Bureau of Standards has no regulatory power in the enforcement of the provisions of voluntary standards, but since these standards represent the will of the interested groups as a whole, their provisions soon become established as trade customs and become effective when the standards are referenced in sales contracts, procurement specifications, government regulations, and the like.
2.	The Responsibility of the Acceptor—The purpose of Voluntary Product Standards is to establish, for specific items, nationally recognized sizes, grades, material requirements, or performance criteria. The benefits that result from these standards will be in direct proportion to general recognition and actual use of the standards. Instances will occur when it may be necessary to deviate from a standard. The signing of an acceptance does not preclude such departures. The acceptor’s signature, however, indicates an intention to follow the standard, where practicable, in the production, distribution, or use and consumption of the product in question.ACCEPTANCE OF VOLUNTARY PRODUCT STANDARD
PS 34-70, FLUORINATED ETHYLENE-PROPYLENE (FEP) PLASTIC LINED STEEL PIPE AND FITTINGS
This form properly completed, signed, and returned will show your acceptance of this Voluntary Product Standard.
Date__________________________
Office of Engineering Standards Services National Bureau of Standards U.S. Department of Commerce Washington, D.C. 20234
Gentlemen:
We are primarily engaged in the following segment of the industry :
□	Production	□ Use/consumption
□	Distribution	□ General Interest
(Please check only one.)
We believe that this Voluntary Product Standard constitutes a useful standard of practice, and we plan to use it as far as practicable. However, we reserve the right to depart from the standard as we deem advisable.
We understand, of course, that only those products which actually conform to the standard in all respects may be represented as conforming thereto.
Signature of authorized officer_____________________________
(Please type or print the following)
Name and title of above officer_______________________________
Organization_______________________________________________
(Fill in exactly as it should be listed.)
Street Address_____________________________________________
City, State, and ZIP Code___________________________________
(Note: Separate acceptances should be filed for each subsidiary company and affiliate which is to be listed as an acceptor.)
* U. S. GOVERNMENT PRINTING OFFICE : 1971 431-996/238