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ASME NM.3.1-2018 pdf download

ASME NM.3.1-2018 pdf download.Nonmetallic Materials Part 1 — Thermoplastic Material Specifications.
1. Scope 1.1 This specification covers poly(vinyl chloride) (PVC) pipe made in standard thermoplastic pipe dimension ratios and pressure rated for water (see appendix). Included are criteria for classifying PVC plastic pipe materials and PVC plastic pipe, a system of nomenclature for PVC plastic pipe, and requirements and test methods for materials, workmanship, dimensions, sustained pressure, burst pressure, flattening, and extrusion quality. Methods of marking are also given. 1.2 The products covered by this specification are intended for use with the distribution of pressurized liquids only, which are chemically compatible with the piping materials. Due to inherent hazards associated with testing components and sys- tems with compressed air or other compressed gases, some manufacturers do not allow pneumatic testing oftheir products. Consult with specific product/component manufacturers for their specific testing procedures prior to pneumatic testing. N OTE 1—Pressurized (compressed) air or other compressed gases contain large amounts of stored energy which present serious safety hazards should a system fail for any reason. N OTE 2—This standard specifies dimensional, performance and test requirements for plumbing and fluid handling applications, but does not address venting of combustion gases. 1.3 The text ofthis specification references notes, footnotes, and appendixes which provide explanatory material. These notes and footnotes (excluding those in tables and figures) shall not be considered as requirements of the specification. 1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.5 The following safety hazards caveat pertains only to the test methods portion, Section 8, of this specification: This standard does not purport to address all ofthe safety concerns, ifany, associated with its use. It is the responsibility ofthe user of this standard to establish appropriate safety and health practices and determine the applicability ofregulatory limita- tions prior to use. A specific precautionary statement is given in Note 7. N OTE 3—CPVC plastic pipe (SDR-PR), which was formerly included in this specification, is now covered by Specification F442/F442M. N OTE 4—The sustained and burst pressure test requirements, and the pressure ratings in the appendix, are calculated from stress values obtained from tests made on pipe 4 in. (100 mm) and smaller. However, tests conducted on pipe as large as 24 in. (600 mm) in diameter have shown these stress values to be valid for larger diameter PVC pipe. N OTE 5—PVC pipe made to this specification is often belled for use as line pipe. For details of the solvent cement bell, see Specification D2672 and for details of belled elastomeric joints, see Specifications D3139 and D3212. 2. Referenced Documents 2.1 ASTM Standards: D618 Practice for Conditioning Plastics for Testing D1598 Test Method for Time-to-Failure of Plastic Pipe Under Constant Internal Pressure D1599 Test Method for Resistance to Short-Time Hydraulic Pressure of Plastic Pipe, Tubing, and Fittings D1600 Terminology forAbbreviated Terms Relating to Plas- tics D1784 Specification for Rigid Poly(Vinyl Chloride) (PVC) Compounds and Chlorinated Poly(Vinyl Chloride) (CPVC) Compounds D2122 Test Method for Determining Dimensions of Ther- moplastic Pipe and Fittings D2152 Test Method for Adequacy of Fusion of Extruded Poly(Vinyl Chloride) (PVC) Pipe and Molded Fittings by Acetone Immersion D2444 Test Method for Determination of the Impact Resis- tance of Thermoplastic Pipe and Fittings by Means of a Tup (Falling Weight) D2672 Specification for Joints for IPS PVC Pipe Using Solvent Cement D2837 Test Method for Obtaining Hydrostatic Design Basis for Thermoplastic Pipe Materials or Pressure Design Basis for Thermoplastic Pipe Products D3139 Specification for Joints for Plastic Pressure Pipes Using Flexible Elastomeric Seals D3212 Specification for Joints for Drain and Sewer Plastic Pipes Using Flexible Elastomeric Seals F412 Terminology Relating to Plastic Piping Systems F442/F442M Specification for Chlorinated Poly(Vinyl Chlo- ride) (CPVC) Plastic Pipe (SDR–PR) 2.2 NSF Standards: Standard No. 14 for Plastic Piping Components and Related Materials Standard No. 61 for Drinking Water Systems Components— Health Effects 3. Terminology 3.1 Definitions—Definitions are in accordance with Termi- nology F412, and abbreviations are in accordance with Termi- nology D1600, unless otherwise specified. The abbreviation for poly(vinyl chloride) plastic is PVC. 3.2 Definitions ofTerms Specific to This Standard: 3.2.1 hydrostatic design stress—the estimated maximum tensile stress the material is capable of withstanding continu- ously with a high degree of certainty that failure of the pipe will not occur. This stress is circumferential when internal hydrostatic water pressure is applied. 3.2.2 pressure rating (PR)—the estimated maximum water pressure the pipe is capable of withstanding continuously with a high degree ofcertainty that failure ofthe pipe will not occur. 3.2.3 relation between standard dimension ratio, hydro- static design stress, and pressure rating—The following ex- pression, commonly known as the ISO equation, is used in this specification to relate standard dimension ratio, hydrostatic design stress, and pressure rating: 2S/P5 R2 1 or 2 S/P5 ~ D 0 /t ! 2 1 (1) where: S = hydrostatic design stress, psi (or MPa), P = pressure rating, psi (or MPa), D 0 = average outside diameter, in. (or mm), t = minimum wall thickness, in. (or mm), and R = standard thermoplastic pipe dimension ratio (D 0 /t for PVC pipe), also known as SDR. 3.2.4 standard thermoplastic pipe dimension ratio (SDR)— the ratio of pipe diameter to wall thickness. For PVC pipe it is calculated by dividing the average outside diameter of the pipe in inches or millimetres by the minimum wall thickness in inches or millimetres. If the wall thickness calculated by this formula is less than 0.060 in. (1.52 mm), it shall be arbitrarily increased to 0.060in. (1.52 mm). The SDR values shall be rounded to the nearest 0.5. 3.2.5 standard thermoplastic pipe materials designation code—The pipe materials designation code shall consist of the abbreviation PVC for the type of plastic, followed by the ASTM type and grade in Arabic numerals and the design stress in units of100 psi (0.7 MPa) with any decimal figures dropped. When the design stress code contains less than two figures, a cipher shall be used before the number, thus a complete material code shall consist of three letters and four figures for PVC plastic pipe materials. 4. Classification 4.1 General—This specification covers PVC pipe made and marked with one of six Type/Grade/Design Stress designations (see X1.2) in eleven standard dimension ratios. 4.2 Standard Thermoplastic Pipe Dimension Ratios (SDR)—This specification covers PVC pipe in eleven standard dimension ratios, namely, 13.5, 17, 21, 26, 32.5, 41, and 64 (in the body of the document) and 11, 35, 51 and 81 (in Annex A1.) Standard dimension ratios are uniform for all nominal pipe sizes for each material and pressure rating. These are referred to as SDR 11, SDR13.5, SDR17, SDR21, SDR26, SDR32.5, SDR35, SDR41, SDR51, SDR64, and SDR81, respectively. The pressure rating is uniform for all nominal pipe sizes for a given PVC pipe material and SDR (see Table X1.1). 4.3 Hydrostatic Design Stresses—This specification covers pipe made from PVC plastics defined by four hydrostatic design stresses developed on the basis of long-term tests (appendix). 5. Materials 5.1 General—Poly(vinyl chloride) plastics used to make pipe meeting the requirements of this specification are catego- rized by means of two criteria, namely, (1) short-term strength tests, and (2) long-term strength tests. N OTE 6—The PVC pipe intended for use in the transport of potable water should be evaluated and certified as safe for this purpose by a testing agency acceptable to the local health authority. The evaluation should be in accordance with requirements for chemical extraction, taste, and odor that are no less restrictive than those included in NSF Standard No. 14. The seal or mark of the laboratory making the evaluation should be included on the pipe. See pipe marking requirement for reclaimed water systems. 5.2 Basic Materials—This specification covers pipe made from PVC plastics having certain physical and chemical properties as described in Specification D1784.

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