{"id":1688,"date":"2025-06-27T18:00:01","date_gmt":"2025-06-27T10:00:01","guid":{"rendered":"https:\/\/jblstainless.com\/?post_type=product&p=1688"},"modified":"2025-07-10T16:23:54","modified_gmt":"2025-07-10T08:23:54","slug":"stainless-steel-welded-pipe-astm-a312","status":"publish","type":"product","link":"https:\/\/jblstainless.com\/tl\/stainless-steel-welded-pipe-astm-a312\/","title":{"rendered":"Stainless Steel Welded Pipe ASTM A312"},"content":{"rendered":"
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Stainless Steel Welded Pipe ASTM A312 is a piping material designed for high-temperature and corrosive environments in a wide range of chemical, petrochemical, food processing, pharmaceutical and energy industries.ASTM A312 covers a wide range of stainless steel materials, including 304\/304L, 316\/316L, 310S, 321, 317L, and other grades, which have excellent resistance to high temperatures and corrosion, making it the preferred choice for industrial piping systems.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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ASTM A312 Standard Specification<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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ASTM A312 is a standard specification developed by the American Society for Testing and Materials (ASTM) for seamless, welded, and heavy cold-worked austenitic stainless steel tubing. The standard is suitable for applications in high-temperature and generally corrosive environments in a wide range of chemical, petroleum, food processing, pharmaceutical, construction, and other industrial applications.<\/p>

ASTM A312 stainless steel pipe is available in a wide range of sizes, from 1\/8 inch to 30 inch outer diameters, and wall thicknesses from SCH 5S to SCH XXS.The surface finishes for these pipes include annealed, pickled, hand-polished, mechanically polished, and mirror-polished. In addition, the ASTM A312 standard covers chemical composition requirements for a wide range of grades, such as 304, 304L, 316, and 316L, each grade shall confirm the required chemical composition of C, Mn, P, S, Si, Cr and Cr, Ni, Mo, etc.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Stainless Steel Chemical Composition<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Grade<\/td>C<\/td>Si<\/td>Mn<\/td>P<\/td>S<\/td>Ni<\/td>Cr<\/td>Mo<\/td><\/tr>
304<\/td>\u22640.08<\/td>\u22641.0<\/td>\u22642.0<\/td>\u22640.045<\/td>\u22640.03<\/td>8.0-11.0<\/td>18.0-20.0<\/td>–<\/td><\/tr>
304L<\/td>\u22640.03<\/td>\u22641.0<\/td>\u22642.0<\/td>\u22640.035<\/td>\u22640.03<\/td>9.0-12.0<\/td>18.0-20.0<\/td>–<\/td><\/tr>
316<\/td>\u22640.08<\/td>\u22641.0<\/td>\u22642.0<\/td>\u22640.045<\/td>\u22640.03<\/td>10.0-14.0<\/td>16.0-18.0<\/td>2.0-3.0<\/td><\/tr>
316L<\/td>\u22640.03<\/td>\u22641.0<\/td>\u22642.0<\/td>\u22640.045<\/td>\u22640.03<\/td>11.0-14.0<\/td>16.0-18.0<\/td>2.0-3.0<\/td><\/tr><\/tbody><\/table>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t
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Stainless Steel Welded Pipe ASTM A312 Specification<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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Material Grade:
<\/b>TP304\/304L, TP316\/316L (general corrosion resistant grades)<\/p>

TP321, TP316Ti (high temperature creep resistance)<\/p>

Others: TP309S, TP310S, Duplex (UNS S32205),etc<\/p>

Size Range
<\/b>Outer Diameter: 1\/8”(10.3mm)– 36”(914mm)<\/p>

Wall Thickness: SCH 5S — SCH XXS<\/p>

Length:\u00a020ft, 40ft, Single Random Length, Double Random Length and Customized<\/p>

Tolerances
<\/b>Outer Diameter: \u00b11.64mm for \u2264NPS 1.5-inch pipe, \u00b11.5% for \u2265NPS 2-inch pipe<\/p>

Wall Thickness: Minimum wall thickness not less than 87.5% of nominal value.<\/p>

Surface Finish<\/b><\/p>

2B bright-annealed, No.1 (hot-rolled), polished (mirror) or pickled finishes are available for corrosion resistance<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t

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Manufacturing Process<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t
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The production of ASTM A312 stainless steel pipe involves a variety of processes, such as seamless tubing, which is formed by extrusion or perforation, and welded pipe, which is made by welding stainless steel sheets or coils together.<\/p>

ASTM A312 pipe covers the following manufacturing types (Including hot finished or cold finished):<\/p>

1. Seamless Steel Pipe:<\/b>\u00a0<\/p>

Manufactured by extrusion or piercing process.<\/p>

2. Welded Steel Pipe:<\/b><\/p>

<\/b>Manufactured by welding stainless steel sheet or coil. Typically done by methods such as TIG (tungsten inert gas) welding, MIG (metal inert gas) welding or manual arc welding, and may require preheating and post-weld heat treatment to prevent sensitization and ensure corrosion resistance.<\/p>

Requirements:<\/p>