Austenitic
Duplex Steel
Nickel Alloy
Cobalt Alloy

ASTM A312 Pipe

ASTM A312 Standard Specification for Seamless, Welded, and Heavily Cold Worked Austenitic Stainless Steel Pipe, ASTM A312 Pipe is the general use for high temperature service and general corrosive service. It covers diameters from 1/8” to 30” and thickness from SCH 10S to SCH 80S. Common use material grades are TP304/304L, TP316/316L.

ASTM A312 pipe manufacturing types (Including hot finished or cold finished):

ASTM A312 Seamless Pipe (SMLS)

Stainless steel seamless pipe that manufactured in any process that can not be involved in the welding process. Seamless Pipe should be made from stainless steel billet in hot rolling or cold drawn, no any welding process during manufacturing, seamless pipe has better pressure to withstand, annealing solution and pickling finishing condition, applied for high temperature and corrosion environment.

ASTM A312 Welded Pipe (WLD)

Welded pipe that manufactured by an automatic welding process that does not add filler metal during welding, made from stainless steel strip or plate, both single welding and double welding for option, smail diameter and arge diameter are available, annealing pickling finish.

Heavily Cold-Worked Pipe (HCW Pipe) 

HCW Pipe shall be made by applying cold working of not less than 35 % reduction in thickness of both wall and weld to a welded pipe prior to the final anneal. No filler shall be used in making the weld. Prior to cold working, the weld shall be 100 % radiographically inspected.

Welded and HCW pipe: Welded pipe and HCW pipe of 14 and smaller than NPS 14 shall have a single longitudinal weld. After approval by the purchaser, the welded pipe and HCW pipe with an NPS greater than NPS 14 shall have a single longitudinal weld or shall be manufactured by forming and welding two longitudinal sections of flat stock. So each welds are to be tested, inspected, inspected or treated.

Heat Treatment

All pipe shall be furnished in the heat-treated condition in accordance with the required heat treating temperature and cooling requirements, pipes shall be individually quenched in water or rapidly cooled by other means (direct quenched).

ASTM A312 pipe shall be free from oxide scale and contaminated iron filings. If the steel pipe is brightly annealed, and pickling, blasting or surface finishing may not be mandatory. The purchaser can request that the finished pipe shall do passivating treatment.

Industrial Pipe, High Strength Steel Pipe

Factors such as material, specification and connection method of industrial pipes will affect their performance and safety, so they need to be selected and designed.

Industrial piping is a kind of industrial facility used to transport various fluids (such as water, oil, gas, steam, etc.), which has a wide range of applications in petroleum, chemical, electric power, metallurgy, shipbuilding and other industries. Factors such as material, specification and connection method of industrial pipes will affect their performance and safety, so they need to be selected and designed according to different working conditions and requirements. High-strength steel pipe is a high-quality industrial piping material, which has important applications in the field of industrial piping.

High-strength steel pipe is used in the petroleum industry, such as drilling pipe, casing, oil pipe, oil pipeline, etc.; chemical industry, can be used as the chemical process of the reactor pipe, heat exchanger pipe, storage tank pipe, etc.; electric power industry, such as boiler pipe, turbine pipe, condenser pipe, etc.; metallurgical industry, such as smelting furnace pipe, rolling mill pipe, casting machine pipe, etc.

High-strength steel pipe has the characteristics of high strength, high toughness, high corrosion resistance, high wear resistance and so on.

ASTM A312 TP304 / 304L Stainless Steel Annealed & Pickled Seamless Industrial Pipe

Chemical Composition

Product Description

MTSCO has been dedicated to producing seamless stainless steel pipe since 2003 , owning complete producing technology and abundant managing experience . Our raw material such as mother tube , round bar we use is from Chinese biggest and well known steel mill : Walsin , Yongxing etc . And We have advanced NDT equipments for the tests such as Eddy Current test, Ultrasonic test , Hydraulic test and so on . We have ISO 9001 and PED certificate , and the Third Party Inspection Certificates such as TUV , BV , Lloyd’s , SGS , etc , also can be provided according to customers’ requirements .