Seamless Precision Steel Tube

ASTM A787 Aluminized Precision Steel Tubes for Automotive Applications ASTM A787 aluminized steel tube is an electric-resistance-welded carbon steel mechanical tube manufactured from aluminum-coated steel strip. It combines the dimensional consistency and formability of low-carbon steel tubing with an aluminum-based protective surface, making it particularly suitable for automotive components exposed to elevated temperature, condensate, road contaminants, and repeated thermal

ASTM A587 Electric-Resistance-Welded Low-Carbon Steel Pipe for Chemical Industry ASTM A587 electric-resistance-welded low-carbon steel pipe is specifically manufactured for process piping applications in the chemical industry where reliable weld integrity, good ductility, flanging capability, and close-radius bending performance are required. ASTM A587/A587M covers ERW low-carbon steel pipe from NPS 1/2 [DN 15] through NPS 10 [DN 250], together with specified additional sizes

ASTM A139 Carbon Steel Spiral-Welded Pipe for Fluid Transport ASTM A139 carbon steel spiral-welded pipe is an electric-fusion arc-welded pipe manufactured with a continuous helical seam for transporting water, industrial liquids, gas, or vapor. The specification covers five pipe-mill grades—Grades A, B, C, D, and E—with minimum yield strengths from 205 to 360 MPa. The spiral-forming process supports economical production of large outside diameters while maintaining controlled

ASTM A135 Electric-Resistance-Welded Steel Pipe for Fluid Transport ASTM A135 electric-resistance-welded steel pipe is manufactured from flat-rolled carbon steel using high-frequency electric-resistance or electric-induction welding without adding filler metal. It is intended for conveying water, gas, vapor, compressed air, and other compatible liquids in industrial and commercial piping systems. The ASTM A135/A135M specification contains two material grades: Grade A and

GB/T 34105 Seamless Steel Tubes for Ocean Engineering Structures GB/T 34105 seamless steel tubes are designed for load-bearing offshore and marine engineering structures that require controlled strength, low-temperature toughness, weldability, and consistent dimensional performance. The tubes are suitable for fabricating structural members exposed to wave loading, vibration, impact, cyclic stress, and low-temperature marine environments. Available strength grades range from

GB 28883 Composite Seamless Steel Tubes for Pressure GB 28883 composite seamless steel tubes are pressure-bearing bimetallic seamless tubes designed for boilers, pressure vessels, and pressure piping where the tube must combine mechanical strength from the base metal with corrosion resistance from the cladding metal. The standard defines the tube as a composite structure made from different inner and outer steel grades, with ordering based on “outer grade + inner grade” and

GB/T 20409 20G Seamless Multi-Rifled Steel Tubes for High-Pressure Boiler GB/T 20409 20G seamless multi-rifled steel tubes are internally ribbed boiler tubes designed for high-pressure boiler water-wall service. Compared with plain bore boiler tubes, the internal rifling promotes spiral flow of the steam-water mixture, helping maintain a water film on the inner wall under high heat flux conditions. 20G is a carbon boiler steel grade commonly used under GB/T 5310 material

GB/T 18984 Seamless Steel Tubes for Low-Temperature-Service Piping GB/T 18984 seamless steel tubes are designed for low-temperature pressure vessel piping and low-temperature heat exchanger piping, covering service temperature grades from -45°C to -196°C. They are manufactured by hot-finished or cold-finished seamless processes, with controlled heat treatment and low-temperature impact toughness verification to reduce brittle-fracture risk in cryogenic and refrigerated piping

GB/T 17396 Hot-Rolled Seamless Steel Tubes for Hydraulic Pillar Service GB/T 17396-2022 is the current Chinese national standard for seamless hot-rolled steel tubes used in hydraulic pillar service, issued for tubes used in cylinders and pillars of coal-mine hydraulic support equipment. The standard replaced GB/T 17396-2009 and has been implemented since May 1, 2023. Specifications Item Specification Material Hot-rolled seamless carbon steel and alloy steel tube Standard GB/T

GB/T 14291 L245J/BJ, L290J/X42J, L320J/X46J, L360J/X52J, L390J/X56J Welded Steel Pipes for Ore Pulp Transportation GB/T 14291 welded steel pipes are designed for ore powder, ore pulp, mineral slurry, and dredging pipeline service where pipe strength, weld integrity, dimensional stability, and abrasion allowance are critical. The current GB/T 14291-2016 standard is titled “Welded steel pipe for ore pulp transportation”, was issued on August 29, 2016, and implemented on July 1,

GB/T 13793 Longitudinal Electric Resistance Welded Pipe in 10#, 15#, 20#, Q235B and Q345B GB/T 13793 longitudinal electric resistance welded (ERW) pipe is a straight-seam welded carbon steel pipe for structural service and general fluid conveyance. The standard covers longitudinal electric welded steel pipe up to 711 mm outside diameter, and is commonly selected when buyers need stable dimensional control, efficient production, and a broad material range from low-carbon

GB/T 9808 ZT380 (DZ40) / ZT490 (DZ50) / ZT520 (STM-R780) / ZT540 (DZ55) / ZT590 (DZ60) Thick-Wall Seamless Steel Tubes for Drilling GB/T 9808 seamless steel tubes for drilling are engineered for geological core drilling, water-well drilling, hydrogeological drilling, and engineering drilling. The current standard in force is GB/T 9808-2023, implemented on July 1, 2024, and it covers seamless tubes used for casing stock, core tube stock, coupling stock, ordinary drill rod

GOST 550-75 Alloy Seamless Steel Tubes for Petroleum Processing and Petrochemical Service Although this product is often marketed as “for oil transportation,” GOST 550-75 is technically a seamless steel tube specification for petroleum processing and petrochemical industry equipment and piping, rather than a long-distance transmission line pipe standard. Under GOST 550-75, tubes are supplied in Group A and Group B, with Group A covering fixed-length tubes and tighter

GOST 8734-75 Seamless Cold Formed Steel Pipe Carbon Steel Seamless Pipe Material GOST 8734-75 seamless cold formed steel pipe is a carbon steel seamless tube produced by cold drawing or cold rolling to achieve tighter dimensional tolerance, smoother surface quality, and better consistency than conventional hot-finished tubing. It is widely used where buyers need reliable strength, clean internal and external surfaces, and stable OD/WT control for further machining, hydraulic

GOST 8732-78 Seamless Steel Pipes Hot Deformed For General Purposes Material GOST 8732-78 seamless steel pipes are hot-deformed seamless steel tubes manufactured for general-purpose service. In the GOST system, GOST 8732-78 mainly defines the size range, while the technical requirements, steel grades, inspection, and test rules are coordinated with GOST 8731. Common steels used for this product family include carbon grades such as 10, 20, 35, and 45, as well as selected alloy

EN 10297-1 Seamless Circular Steel Tubes for Mechanical & General Engineering Material Overview EN 10297-1 covers seamless circular steel tubes manufactured from non-alloy and alloy steels for mechanical engineering and general engineering components where reliable strength, machinability, and dimensional stability are required. Typical supply routes include hot-finished and cold-finished tubes, with heat treatment options (e.g., normalized) selected to match forming, welding

EN 10219-2 Cold Formed Welded Structural Hollow Sections (Pipe/Tubing) for Building Construction Material EN 10219 cold formed welded structural hollow sections are load-bearing steel tubes manufactured by cold-forming strip/plate into a closed section and producing a continuous weld (commonly ERW/HF). EN 10219-2 governs tolerances, dimensions, and sectional properties, while steel grades and delivery requirements are defined in EN 10219-1. Typical grade options (examples):

GOST 8731-74 Seamless Hot-Deformed Steel Pipe for Industrial Service Material GOST 8731-74 covers seamless hot-deformed (hot-finished) steel pipes for general industrial use, manufactured from carbon and alloy steels. Pipe dimensions and tolerances are applied per the referenced size/tolerance standards (notably GOST 8732 and GOST 9567), and pipes can be ordered by quality group (A/B/V/G/D) depending on whether mechanical properties, chemistry, or test pressure is prioritized

EN 10217-4 Electric Welded Non-Alloy Steel Tube (Specified Low-Temperature Properties) Material EN 10217-4 covers electric welded, circular tubes for pressure purposes, made from non-alloy quality steels with specified low-temperature properties (two test categories). Typical grades include P215NL (1.0451) and P265NL (1.0453). Steels are required to be fully killed. Specifications Manufacturing process: Electric welded (ERW / EW) pressure tube per EN 10217-4 scope. Steel

ASME B36.10M Welded and Seamless Wrought Steel Pipe Material ASME B36.10M defines dimensional standardization for welded and seamless wrought steel pipe used in piping and pipeline systems under high or low temperatures and pressures. The standard focuses on outside diameter (OD), wall thickness (Schedules), and mass/weight, while the steel grade (chemistry & strength) is selected separately based on service conditions and project codes. Typical compatible materials include