Product Overview：
Alloy pipe is a type of seamless steel pipe, which is divided into structural seamless pipe and high-pressure heat-resistant alloy pipe. Mainly different from the production standards and industry of alloy tubes, annealing and tempering of alloy tubes are carried out to change their mechanical properties and achieve the required processing conditions. Its performance is more versatile and has higher utilization value than ordinary seamless steel pipes. The chemical composition of alloy pipes contains more Cr, and it has high temperature resistance, low temperature resistance, and corrosion resistance. Ordinary carbon seamless pipes do not contain alloy components or have very few alloy components, so alloy pipes are widely used in industries such as petroleum, aerospace, chemical, power, boilers, and military.
| Product List |
| Product Name: | Precision alloy steel pipe | Seamless steel pipe |
| Product Name: | Hastelloy Pipe | Seamless Steel Pipe |
| Product Name: | Low alloy seamless steel pipe | Alloy steel pipe |
| Product Name: | Q235 alloy pipe | seamless steel pipe |
| Product Name: | Q345 alloy pipe | seamless steel pipe |
| Product Name: | 16Mn alloy pipe | seamless steel pipe |
| Product Name: | 40Cr alloy pipe | seamless steel pipe |
| Product Name: | 27SiMn alloy pipe | seamless steel pipe |
| Product Name: | 12Cr1MoV alloy pipe | Seamless steel pipe |
| Product Name: | 15CrMo alloy pipe | seamless steel pipe |
| Parameter range |
| Outer diameter | Φ6mm‑Φ630mm |
| Wall thickness | 0.5mm‑80mm |
| Standard length | 1‑12m， Customizable short and extended non ruler |
| Outer diameter accuracy | Maximum ± 0.03mm |
| Executive Standards | ASTM A335, EN 10216-2, DIN 17175, GB/T 5310 |
| Non-standard customization | Special wall thickness, honing inner holes, and pressure deep processing can all be customized |
| Common specifications for small and medium-sized hot-rolled/cold drawn alloy pipes |
| Outer diameter （mm） | 25
| 32 | 38 | 42 | 45 | 48 | 51 | 57 | 60 |
| Common wall thickness（mm） | 2.5-4 | 2.5-6 | 3-8 | 3-10 | 3-10 | 3-12 | 3-12 | 3-14 | 3-16 |
| Outer diameter （mm） | 63.5 | 76 | 89 | 108 | 114 | 121 | 133 | 146 | 159 |
| Common wall thickness（mm） | 3-16 | 4-20 | 4-22 | 4-28 | 4-30 | 4-32 | 4-36 | 6-40 | 6-45 |
| Common specifications for medium and large diameter hot expanded/hot-rolled alloy pipes |
| Outer diameter （mm） | 168 | 194 | 219 | 245 | 273 | 299 | 325 |
| Common wall thickness（mm） | 6-50 | 6-55 | 6-60 | 8-65 | 8-70 | 8-75 | 8-80 |
| Outer diameter （mm） | 351 | 377 | 426 | 450 | 480 | 530 | 610 |
| Common wall thickness（mm） | 10-85 | 10-90 | 10-100 | 12-100 | 12-100 | 12-100 | 14-100 |
Optional tolerance range |
| Tolerance control | Optional manufacturing process |
| Tolerance ≤ 0.05 mm | Cold rolling |
| Tolerance ≤ 0.10 mm | Cold rolling |
| Tolerance ≤ 0.30 mm | Cold drawing | Cold rolling |
| Tolerance ≤ 0.50 mm | Cold drawing | Hot rolling |
| Tolerance ≤ 1.00 mm | Hot rolling | Hot expanding |
| National standard tolerance (ordinary grade, commonly used GB5310-2023/GB/T8163) |
| Outer diameter tolerance (hot-rolled) |
| Outer diameter (mm) | ≤159 | ＞159 |
| Allowable deviation | ± 1.0% D, minimum ± 0.5mm | ±1.0%D |
| Wall thickness tolerance (hot rolling) |
| Wall thickness (mm) | ＜3.5 | 3.5‑20 | ＞20，D＜219 | ＞20，D≥219 |
| Allowable deviation | +15%S / -10%S | +15%S / -10%S | ±10%S | +12.5%S / -10%S |
| Outer diameter tolerance of cold drawn alloy tube |
| Outer diameter (mm) | ≤30 | 30‑50 | ＞50 |
| Ordinary level deviation | ±0.30mm | ±0.40mm | ±0.8%D |
Optional delivery status
|
| Oil removal from oil pipes | Annealing and straightening | Steel pipe corrosion prevention |
| Steel pipe threading | Length cut-to-length | Steel pipe coating |
| Steel pipe cap | Exquisite bundling | Beveling |
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