high corrosion resistance A312 TP904L welded pipe for oil and gas

A312 TP904L welded pipe

TP904L is an ultra-low carbon high alloy austenitic stainless steel with excellent corrosion resistance, especially in strong oxidizing acid (such as sulfuric acid) environment. Due to the addition of high content of chromium, nickel, molybdenum and copper elements, TP904L welded pipe is not only resistant to intergranular corrosion, pitting corrosion and crevice corrosion, but also has good resistance to stress corrosion cracking. The material has good welding performance and is suitable for a variety of welding processes, and no heat treatment is required after welding. TP904L welded pipe is widely used in petrochemical, marine engineering, fertilizer production, acid production equipment, pharmaceutical and other industries, especially suitable for working conditions with extremely high requirements for corrosion resistance.

Parameter Table：

Factory advantages and features:

MTSCO has made a strategic investment in HUXIN Pipe Industry, which has 36 years of professional pipe manufacturing experience, thereby establishing its reliable position in the field of welded pipe manufacturing. Relying on the years of industry accumulation of cooperative enterprises, MTSCO can ensure the high-quality delivery of welded pipe products.

In terms of supply chain construction, MTSCO also demonstrates strong integration capabilities. HUXIN PIPE, in which the company invested, has 35 years of experience in welded pipe manufacturing and has obtained international certifications such as ISO, PED, AD2000, and M650. MTSCO has established in-depth strategic cooperation with it and has become HUXIN's only international sales center, fully responsible for its global business expansion. HUXIN has a full set of advanced production and inspection facilities, such as CNC bending machines, shearing machines, 12-meter annealing furnaces, pickling tanks, ultrasonic eddy current integrated machines, and physical and chemical experimental instruments, to ensure the consistency and controllability of products from the source.

MTSCO's welded pipes have a variety of specifications, with a maximum diameter of 3 meters and a maximum diameter of 1.5 meters that can be tested by water pressure, meeting the application needs of multi-industry projects and enhancing customization flexibility.

The company's production system is highly automated, and the bending machine supports a maximum thickness of 60mm and a length of 12 meters, which improves the accuracy and manufacturing efficiency of the product. The quality control process is strict, and the entire process is supervised by professional quality inspectors, and a 100% filming and recording system is implemented to ensure traceability.

MTSCO's focus on product quality is not only reflected in equipment and processes, but also in the authoritative certifications it has obtained, further consolidating customers' trust in the quality and reliability of the company's welded pipe products. The exclusive cooperation mechanism has significantly improved order response capabilities and delivery guarantees.

Quality Control Methods

Strictly control the quality of raw materials

The raw materials come from large steel mills such as Baosteel, Qingshan, TISCO, and Dongfang Special Steel. MTC and PMI reports are required for each batch. PMI inspection is carried out again after arrival at the factory to double confirm the accuracy of the material and ensure the quality of the source.

Automated welding and full-process traceability management

The product is formed by rolling and bending, and adopts PAW + GTAW fully automatic welding process, and the weld is full and stable. The upgraded process solves the problem of out-of-round welds of large-diameter thick-walled pipes, and the 12-meter annealing furnace improves the annealing quality. The entire production process is monitored by the engineering and technical team and quality inspection personnel, and supporting process cards and image archives to ensure that every detail is traceable.

Comprehensive inspection before delivery

All finished products must pass routine inspections such as appearance, PMI, and size before shipment, and undergo comprehensive inspections such as mechanical properties, hardness, water pressure, UT, ET, and 100% X-ray inspection. We also accept quality verification by third-party testing agencies such as SGS, TUV, and BV to ensure customer confidence in use.

Product Packaging：