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Help CenterSteel Pipe & Tube & Alloy Steel Pipe，P11/P22/P91/T91、A335 P5、ASTM A519、13CrMo44
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Alloy Steel Pipe is high‑performance seamless pipe smelted by adding chromium, molybdenum, vanadium, nickel and other alloying elements on carbon‑steel base. In the industry, Alloy Steel Pipe, High‑Pressure Alloy Steel Pipe and Heavy‑Wall Alloy Steel Pipe are collectively defined as special high‑temperature pressure‑resistant piping. Optimized alloy formula delivers outstanding high‑temperature resistance, high‑pressure resistance, creep resistance and impact resistance, enabling stable long‑term service under high‑temp, high‑pressure and corrosive‑medium conditions. It serves as core piping material for power stations, petrochemical refining, boiler thermal systems and heavy‑duty equipment. Alloy Steel Pipe mainly includes two mainstream categories: High‑Pressure Alloy Steel Pipe and Heavy‑Wall Alloy Steel Pipe. Ordinary High‑Pressure Alloy Steel Pipe applies for boiler superheaters, steam transmission and chemical process pipelines for high‑temp & high‑pressure fluid transportation.Heavy‑Wall Alloy Steel Pipe features thick wall with stronger pressure‑bearing capacity, widely used for high‑pressure vessels, hydraulic cylinders, heavy‑equipment cylinder bodies and high‑pressure cracking pipelines under heavy‑load and extreme internal‑pressure conditions. Produced by billet piercing, hot rolling, cold drawing and quenching‑tempering heat‑treatment, Alloy Steel Pipe obtains dense & uniform microstructure without weld defects. Strict temperature‑controlled rolling endows High‑Pressure Alloy Steel Pipe excellent high‑temperature creep resistance for power‑station boiler high‑temperature pipelines. Heavy‑Wall Alloy Steel Pipe is finished by hole‑expanding & wall‑reducing process with uniform wall thickness, outstanding anti‑explosion performance and high NDT passing rate. Alloy Steel Pipe has complete specifications and sufficient stock. Deep processing services such as cutting, chamfering, beveling, anti‑corrosion treatment and non‑destructive inspection are available. Custom non‑standard outer diameter, special wall thickness and fixed‑length can be produced. High‑Pressure Alloy Steel Pipe and Heavy‑Wall Alloy Steel Pipe adapt to various engineering projects including thermal power, petrochemical, coal‑chemical, hydraulic equipment and pressure vessels.Alloy Steel Pipe is indispensable special pipe for high‑temperature high‑pressure industrial piping field.
1. Material Grade
‑ Domestic Grades: 12Cr1MoVG, 15CrMoG, 35CrMo, 42CrMo, 16Mn
‑ Export Grades: P11/P22/P91/T91, A335 P5, ASTM A519, 13CrMo44
2. Execution Standards
‑ GB/T 5310‑2017 Seamless steel tubes for high‑pressure boilers, GB/T 8162‑2018 structural pipe, GB/T 8163‑2018 fluid pipe, core national standards for Alloy Steel Pipe
‑ International Standards: ASTM A335, ASME SA213, EN 10216‑2, complying with foreign‑trade project acceptance. High‑Pressure Alloy Steel Pipe and Heavy‑Wall Alloy Steel Pipe support full‑set tests including hydrostatic test, UT ultrasonic test, MT magnetic‑particle test, tensile & impact test.
3. Specification Parameters
Alloy Steel Pipe outer diameter:10‑820mm, wall thickness:1‑100mm, standard fixed length:6m‑12m, multiple‑length and arbitrary fixed‑length customization supported. High‑Pressure Alloy Steel Pipe owns smooth inner & outer surface and controllable wall‑thickness tolerance to meet blanking & construction requirements for power‑station boilers and thermal pipelines. Heavy‑Wall Alloy Steel Pipe can be supplied in bulk with large‑diameter & heavy‑wall, dense microstructure without interlayer or cracks, high‑precision Alloy Steel Pipe is available from stock. All Alloy Steel Pipe supports saw cutting, beveling, chamfering, heat‑treatment and UT inspection, non‑standard sizes can be customized according to customer drawings.
4. Surface Treatment
‑ Hot‑rolled black surface (regular for Alloy Steel Pipe): original hot‑rolled finish for direct welding & installation of boiler and chemical pipelines.
‑ Cold‑drawn bright finish: smooth inner‑outer surface with high dimensional accuracy, widely used for hydraulic cylinder barrels ofHeavy‑Wall Alloy Steel Pipe.
‑ Pickling & passivation: oxide scale removed with clean inner bore, suitable for chemical‑medium transportation of High‑Pressure Alloy Steel Pipe.
‑ High‑Pressure Alloy Steel Pipe and Heavy‑Wall Alloy Steel Pipe support anti‑rust oil coating, plastic end caps and spray‑paint anti‑corrosion for warehouse storage and sea‑export container loading.
5. Main Applications
Alloy Steel Pipe is widely used in thermal‑power boilers, petrochemical refining units, coal‑chemical pipelines, high‑pressure hydraulic equipment, pressure vessels and thermal pipe networks. High‑Pressure Alloy Steel Pipe is mostly applied for power‑station superheaters, reheaters, high‑temperature steam pipelines and chemical high‑temperature process pipelines, conveying high‑temp & high‑pressure media. Heavy‑Wall Alloy Steel Pipe serves for hydraulic cylinders, high‑pressure cylinder bodies, high‑pressure cracking pipelines and heavy‑duty pressure‑bearing components enduring extreme internal pressure. Enterprises of power, petrochemical and equipment manufacturing select Alloy Steel Pipe according to working pressure and temperature.High‑Pressure Alloy Steel Pipe is preferred for high‑temperature fluid transportation, and Heavy‑Wall Alloy Steel Pipe for heavy‑load high‑pressure structural conditions, giving full play to advantages of Alloy Steel Pipe such as high‑temperature resistance, high‑pressure resistance, creep resistance and reliable operation.
6. Packing, MOQ & Lead Time
‑ Packing: Alloy Steel Pipe fitted with plastic end‑protection caps, bundled tightly with steel wire, product labels attached, rain‑proof wrapping to avoid collision & rust during land transportation and sea‑export container loading.
‑ MOQ: 1 ton minimum order, mixed batch of High‑Pressure Alloy Steel Pipe and Heavy‑Wall Alloy Steel Pipe is available, small‑batch trial orders negotiable.
‑ Lead Time: 3‑7 working days for regular stock Alloy Steel Pipe; 7‑14 working days for beveling, NDT inspection and heat‑treatment processing. Mill certificates and mechanical‑NDT test reports are provided; SGS third‑party inspection is acceptable. Support FOB, CIF, DAP and other international‑trade terms.
7. Product Advantages
Alloy Steel Pipe is integrally seamless without weld‑joint risks, resisting leakage under high‑temperature & high‑pressure conditions with high operation safety factor.
High‑Pressure Alloy Steel Pipe adopts well‑balanced alloy composition with excellent high‑temperature creep resistance, resisting deformation & cracking under long‑time high‑temperature service for core boiler pipelines in power plants.
Heavy‑Wall Alloy Steel Pipe owns thick wall with strong anti‑burst pressure capacity and good impact toughness, suitable for heavy‑load pressure‑bearing scenarios such as hydraulic cylinders and high‑pressure vessels.
Alloy Steel Pipe covers complete size range, available for quenching & tempering heat‑treatment, featuring good machinability and weldability to satisfy drawing requirements from multiple industries.
Full‑range Alloy Steel Pipe has complete qualification documents with batch‑by‑batch NDT inspection support. High‑Pressure Alloy Steel Pipe and Heavy‑Wall Alloy Steel Pipe fully meet standards for domestic industrial projects and global foreign‑trade export.
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