Classification of Seamless Steel Pipes
1. Classification by Production Method
| Parent Category |
Sub-category |
Description |
| Seamless Steel Pipe |
Hot Rolled Pipe |
Rolled after heating and piercing, with uniform wall thickness |
| Seamless Steel Pipe |
Cold Drawn / Cold Rolled Pipe |
Higher dimensional accuracy and better surface finish |
| Welded Steel Pipe |
Longitudinal Welded Pipe (ERW/LSAW) |
Formed by rolling steel plate with straight seam welding |
| Welded Steel Pipe |
Spiral Welded Pipe (SSAW) |
Formed by spiral rolling of steel strip and welded spirally |
2. Classification by Application
| Parent Category |
Sub-category |
Typical Standard |
SANONPIPE |
| Line Pipe |
API 5L Gr.B / X42~X80 |
API 5L |
Core Product |
| Boiler Pipe |
High-pressure Boiler Pipe (GB5310 / ASME SA192/210/213/335) |
GB5310, ASME |
Core Product |
| Boiler Pipe |
Low & Medium-pressure Boiler Pipe (GB3087) |
GB3087 |
Available Supply |
| Petroleum Cracking Pipe |
GB9948 |
GB9948 |
Supplied on Demand |
| Chemical Fertilizer Equipment Pipe |
GB6479 |
GB6479 |
Supplied on Demand |
| Mechanical Structural Pipe |
GB/T8162, ASTM A519 |
GB/T8162 |
Supplementary Product |
| Fluid Pipe |
GB/T8163, ASTM A106 |
GB/T8163 |
Supplementary Product |
3. Classification by Material
| Parent Category |
Sub-category |
Typical Grade |
SANONPIPE |
| Carbon Steel Pipe |
Mild Carbon Steel |
10#, 20#, Q195, Q235 |
Commonly Used |
| Carbon Steel Pipe |
High-quality Carbon Steel |
20#, 45#, A106B |
Commonly Used |
| Alloy Steel Pipe |
Low Alloy Steel |
15CrMo, 12Cr1MoV |
Core Product |
| Alloy Steel Pipe |
Chrome-Moly Alloy Steel |
P11, P22, P91, P92 |
Core Product |
| Stainless Steel Pipe |
Austenitic Stainless Steel |
304, 316, 321 |
Supplied on Demand |
| Stainless Steel Pipe |
Ferritic / Martensitic Stainless Steel |
409, 410 |
Supplied on Demand |
| Low-temperature Steel Pipe |
ASTM Standard |
A333 Gr.6 |
Supplied on Demand |
| Low-temperature Steel Pipe |
GB Standard |
16MnDG, 09MnNiD |
Supplied on Demand |
4. Classification by Section Shape
| Parent Category |
Sub-category |
Description |
SANONPIPE |
| Round Pipe |
Standard Round Pipe |
Outer diameter: 6-2000mm |
Over 80% of Products |
| Square & Rectangular Pipe |
Square Pipe / Rectangular Pipe |
Side length: 20-500mm |
Over 20%, mainly for European Market |
| Special-shaped Pipe |
Elliptical, Hexagonal, Semicircular, etc. |
Special cross-section |
Rarely supplied |
5. Classification by Connection End Type
| Parent Category |
Sub-category |
Description |
SANONPIPE |
| Plain End Pipe |
Plain End |
Without end processing |
Commonly Used |
| Threaded Pipe |
Taper Thread (NPT/BSPT) |
Sealing thread |
Custom Processing Available |
| Threaded Pipe |
Straight Thread |
Non-sealing thread |
Custom Processing Available |
| Grooved Pipe |
Groove Connection |
For fire protection and water supply |
Custom Processing Available |
| Beveled End Pipe |
Welding Bevel |
V-type, U-type bevel |
Commonly Used |
Business Scope Summary of SANONPIPE
| Classification Dimension |
Business Coverage |
| Production Method |
Mainly seamless steel pipe; welded steel pipe supplied on demand |
| Application |
Core: API 5L line pipe + ASME/GB boiler pipe; Supplementary: structural pipe & fluid pipe |
| Material |
Mainly carbon steel and alloy steel |
| Section Shape |
Over 95% round pipe; square & rectangular pipe available on request |
| Connection Mode |
Beveled end as standard; thread and groove processing available |
| Surface Finish |
Standard black varnish coating; galvanizing and anti-corrosion treatment optional |
