ASTM A312 / A269 EFW Annealed & Pickled Stainless Steel Welded Tube

Parameter Table：

ASTM A312 TP316L welded pipe：

ASTM A312 TP316L welded pipe is a low-carbon austenitic stainless steel pipe with excellent corrosion resistance, especially suitable for chloride environments. 316L contains a high proportion of nickel and 2-3% molybdenum, which makes it excellent in pitting, crevice corrosion and stress corrosion cracking. Compared with 316, the low carbon content of 316L effectively reduces the problem of carbide precipitation during welding, improves the corrosion resistance of welded joints, and is suitable for high-cleanliness or frequent welding industrial scenes. This material is widely used in industries such as chemical, pharmaceutical, food processing, marine engineering and water treatment systems. In these fields, 316L welded pipes are usually used to transport corrosive liquids, gases or high-purity media, which can not only meet the strength requirements, but also ensure the long-term stable operation of the system. In addition, the pipe can be provided with PE film, woven bags or wooden box packaging for easy transportation and export.

Chemical Composition:

Physical Property:

Factory advantages and features:

Investing in Huxin Pipe, a factory with 36 years of pipe-making expertise, MTSCO has become a highly reliable manufacturer of welded pipes. This strategic partnership ensures the delivery of top-notch welded pipes backed by decades of industry experience.

The welded pipes from MTSCO come in a variety of sizes, with diameters reaching up to 3 meters, and hydrostatically tested pipes available in sizes up to 1.5 meters. This diversity in size caters to a wide range of industrial applications, providing flexibility to meet specific project requirements.

Equipped with state-of-the-art production and inspection equipment, including a CNC bending machine, plate shearing machine, 12m annealing furnaces, pickled pool, ultrasonic eddy current integrated machines, and a physical and chemical lab, MTSCO ensures a comprehensive manufacturing process. The bending machine, with a maximum thickness capacity of 60MM and a length of 12 meters, adds to the precision and versatility of the production process.

To guarantee the quality of the welded pipes, MTSCO has implemented a complete quality control process. Full-time quality inspectors from MTSCO supervise the entire production process before, during, and after manufacturing, with the added assurance of 100% filming of all welded pipes.

Furthermore, MTSCO's commitment to quality is reflected in the attainment of various certificates, including ISO/PED/AD2000 certifications. These certifications underscore the adherence to stringent industry standards, providing clients with confidence in the quality and reliability of MTSCO's welded pipes.

Quality control method：

Secondary inspection of raw materials

The raw materials used by MTSCO are all from well-known Chinese steel mills, such as Baosteel, Qingshan, TISCO, Dongfang Special Steel, etc., to ensure reliable quality. Each batch of raw materials must provide a material certificate (MTC) and PMI (spectral analysis) report. After the raw materials arrive at the factory, we will also conduct a secondary PMI test to ensure that they fully meet the production requirements and eliminate the risk of unqualified raw materials.

Production management with traceability throughout the process

MTSCO's welded pipes are mainly formed by rolling (RBE) and bending, using PAW+GTAW automatic welding process to ensure full weld formation and stable quality. We have upgraded the technology based on traditional processes, especially for large-diameter thick-walled welded pipes. Problems such as out-of-round welds have been optimized. At the same time, a 12-meter-long annealing furnace is used for solid solution treatment to make the annealing effect more uniform and thorough. The production process is supervised by experienced engineers and quality inspectors throughout the process. Each process is recorded and photographed for archiving, and the whole process is traceable in combination with the process flow card.

100% quality inspection before leaving the factory

Before leaving the factory, MTSCO conducts a comprehensive quality inspection on each welded pipe, including basic inspections such as appearance, size, quantity, PMI, as well as mechanical property testing, hardness testing, X-ray flaw detection, ultrasonic testing (UT), eddy current testing (ET), water pressure testing, etc. The maximum supported water pressure test is an outer diameter of 630mm, and the weld part is 100% X-ray non-destructive testing. We also support the verification of third-party testing agencies such as SGS, TUV, BV, etc. to ensure that each batch of products is of reliable quality and meets the standards.

Product Packaging：