ASTM A312/A312M-16 pdf free.Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipes.
This specification2 covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.
3. Terminology
3. I Definitions.
3. 1. I The definitions in Specification A999/A999M and Terminology A94I are applicable to this specification.
4. Ordering Information
4.1 Orders for material to this specification shall conform to the requirements of the current edition of Specification A999/A999M.
5. General Requirements
5.1 Material furnished under this specification shall con- form to the applicable requirements of the current edition of Specification A999/A999M unless otherwise provided herein.
6. Materials and Manufacture
6.1 Manufacture
6. I I The pipe shall be manufactured by one of the follow Ing processes
6.1.2 Seamless (SML) pipe shall be made by a process that does not involve welding at any stage of production.
6.1.3 Welded ( WLD) pipe shall be made using an automatic welding process with no addition of filler metal during the elding process.
6.1.6 At the option of the manufacturer, pipe shall be either hot finished or cold finished.
6.1.7 The pipe shall be free of scale and contaminating exogenous iron particles. Pickling. blasting. or surface finishing is not mandatory when pipe is bright annealed. The purchaser is permitted to require that a passivating treatment be applied to the finished pipe.
6.2 Heat Treatment—All pipe shall be furnished in the heat-treated condition in accordance with the requirements of Table 2. Alternatively, for seamless pipe. immediately following hot forming while the temperature of the pipes is not less than the minimum solution treatment temperature specified in Table 2. pipes shall be individually quenched in water or rapidly cooled by other means (direct quenched).
7. Chemical Composition
7.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 1.
9. Permitted Variations in Wall Thickness
9. 1 In addition to the implicit limitation of wall thickness for seamless pipe imposed by the limitation on weight in Specification A999/A999M. the wall thickness for seamless and welded pipe at any point shall be within the tolerances specified in Table 3, except that for welded pipe the weld area shall not be limited by the “over” tolerance. The wall thickness and outside diameter for inspection for compliance with this requirement for pipe ordered by NPS and schedule number is shown in Table X1.1.
10. Tensile Requirements
10.1 The tensile properties of the material shall conform to the requirements prescribed in Table 4.ASTM A312/A312M-16 pdf free download.