Corrosion-Resistant ASTM A312 TP304 /304L, 304H ERW Welded Pipe for Heat Exchanger System

ASTM A312 TP304 pipe：

ASTM A312 TP304 welded pipe is made of austenitic stainless steel 304, which has excellent corrosion resistance, good welding performance and high mechanical strength, and is suitable for a variety of industrial fluid transportation and structural support scenarios. Its chemical composition contains 18% chromium and 8% nickel, which makes it have excellent oxidation resistance and acid and alkali corrosion resistance at room temperature and medium temperature, especially suitable for fresh water, steam, food processing and general chemical medium environment. TP304 welded pipe has a smooth surface, is easy to clean, and has good thermal conductivity, so it is widely used in heat exchangers, condensers, boilers, architectural decoration and mechanical equipment. At the same time, welded pipes are lower in cost than seamless pipes, and are particularly suitable for projects with moderate structural strength requirements but economic requirements. Standardized production ensures its dimensional accuracy and consistency, and is a reliable and cost-effective pipe choice in industrial systems.

Parameter Table：

Chemical Composition:

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：