ASTM A213 Seamless Stainless Steel Pipe 304 304L 304H 316 316H 316L SS Tube

ASTM A213 covers seamless Ferritic and Austenitic steel boiler, superheater, and heat-exchanger tubes, designated Grades TP201, TP202, TP304, TP304H, TP316, TP316L, TP309, TP310, TP347H etc. Shew-e steel is one of the leading ASTM A213 Seamless Stainless Steel Tubes suppliers and distributors, we stock a large inventory of 304, 304H, 316, 316L, 309, 321, 347 stainless steel tube originated from China state-owned steel mill, please contact us now.

Types of stainless steel seamless pipes

Hot-rolled seamless pipes: Hot-rolled seamless pipes are pipes made by piercing heated steel billets and then rolling them. This manufacturing method has the advantages of simple process and high production efficiency, and is suitable for the production of large-diameter, thick-walled pipes.

Cold-drawn seamless pipes: Cold-drawn seamless pipes are pipes made by piercing hot-rolled pipes and then using a cold-drawing process. This manufacturing method can ensure the accuracy of pipe size and the excellent surface quality, and is suitable for making pipes with high precision requirements.

Main production process of hot rolling

Round steel → re-inspection → peeling → cutting → centering → heating → perforation → pickling → flat head → inspection and grinding → cold rolling (cold drawing) → degreasing → heat treatment → straightening → cutting (sizing) → pickling/passivation → finished product inspection (eddy current, ultrasound, water pressure) → packaging and storage.

Scope of application: ASTM A213 Seamless Stainless Steel Tubes suitable for boilers, superheaters, heat exchangers and other similar high temperature and high pressure environments. These steel pipes need to have good high temperature resistance, high pressure resistance and corrosion resistance to ensure safe operation and long service life under harsh working conditions.

Grade and chemical composition: The chemical composition requirements of various grades of alloy steel pipes are specified. The chemical composition of different grades of steel pipes varies to meet different performance requirements. For example, common grades include T2, T5, T11, T12, T22, T91, etc. The chemical composition of each grade includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S), chromium (Cr), nickel (Ni), molybdenum (Mo) and other elements. The content range is clearly specified. For example, the carbon content of T11 grade is required to be between 0.05% and 0.15%, and the chromium content is between 1.00% and 1.50%.

Size specifications: Covers the requirements of dimensions such as outer diameter and wall thickness. The outer diameter range usually ranges from smaller sizes such as 1/8 inch (about 3.18 mm) to larger sizes such as tens of inches. The wall thickness also has a corresponding range according to different outer diameters and usage requirements. The specific size specifications will be selected according to the actual application requirements.

Mechanical properties: Clarifies the mechanical performance indicators that ASTM A213 Seamless Stainless Steel Tubes should have under different conditions, such as tensile strength, yield strength, elongation, etc. For example, the tensile strength of some grades of steel pipes may be required to be no less than a certain value (such as 400MPa or higher), and the yield strength is also specified accordingly to ensure that the steel pipe can withstand the corresponding loads and stresses during use without excessive deformation or damage.

Manufacturing process: Including hot rolling, cold drawing, hot expansion and other production methods. Different manufacturing processes will affect the performance and quality of steel pipes, so it is necessary to produce according to the process requirements specified in the standard to ensure that the quality and performance of the steel pipe meet the standards.

Quality control and inspection: specifies the methods and inspection requirements for quality control of steel pipes, including chemical composition analysis, dimensional measurement, appearance inspection, non-destructive testing (such as eddy current testing, ultrasonic testing, etc.) and mechanical properties testing. Through strict quality control and inspection, ensure that each seamless stainless steel pipe that meets the ASTM A213 standard can meet the design and use requirements.

Delivery status: Usually delivered in a heat-treated state, such as annealing, normalizing, etc., to obtain the required performance and microstructure. The heat treatment state will affect the strength, toughness and corrosion resistance of the steel pipe.

Due to its good performance and quality assurance, ASTM A213 Seamless Stainless Steel Tubes standard are widely used in high temperature, high pressure and corrosive environments in industries such as petrochemicals, power, boilers, and heat exchangers. Steel pipes of different grades and specifications are suitable for different specific application scenarios. When selecting, users need to comprehensively consider factors such as actual working conditions, medium characteristics, and design requirements, and select steel pipe products that meet the requirements.