| Standard | ASTM | Grade | 300 Series/200 Series/400 Series |
| Place of Origin | Chongqing, China | Section Shape | Square |
| Model Number | ZS-1 | Alloy Or Not | Is Alloy |
| Type | Seamless | Surface Finish | 2B |
| Application | Construction | Invoicing | by theoretical weight |
| Tolerance | ±1% | Delivery Time | 22-30 days |
| Processing Service | Bending, Welding, Decoiling, Punching, Cutting, Moulding | ||
| Steel Grade | 300 Series, 301L, 301, 310S, 316L, 316, 321, 410S, 410L, 436L, S32304, 430, 309S, 304, 439, 409L, 436, 304L, S32101 | ||

Our associate factory located at Chongqing, which specializes in producing reliable quality welded pipes, seamless pipes, galvanized pipes, spiral pipes, large diameter thick wall pipe, steel sheets and other custom-made various precision metal products with an annual output of 200,000 tons.