| 材料 | 双相不锈钢 | 形状 | Pipes |
|---|---|---|---|
| 类型 | 无缝和焊接 | ||
| 强光 | UNS S32750 Duplex Steel Welded Pipe， Duplex Steel Seamless Boiler Pipe， ASME SA790 Duplex Stainless Steel Pipes | ||
| 产品名称 | 锅炉管 | 标准： | ASTM A790 / ASME SA790 |
|---|---|---|---|
| 材料 | 双相钢 | 结束： | 平端/斜端 |
| 形式 | 直形和 U 形弯曲 | 类型 | 无缝和焊接 |
| 包装 | 胶合板箱，捆绑 | ||
| 强光 | ASME SA790 双相钢管，双相钢，锅炉管，冷凝器管 | ||
ASTM A790 / ASME SA790 S32750 Duplex Steel Pipe
概述
ASTM A790 S32750 is a standard specification for seamless and welded ferritic/austenitic stainless steel pipe. S32750 is a super duplex stainless steel， which has a higher strength and better corrosion resistance than duplex stainless steels like S31803. This specification covers pipes that are intended for general corrosive service， high-temperature service， and low-temperature service. The pipes may be either seamless or welded and may be produced by various welding processes such as electric resistance welding， electric fusion welding， or submerged arc welding.
Chemical Composition of ASTM A790 S32750
| 等级 | C | 锰 | S | P | Si | 倪 | Cr | 莫 | N | |
| S32205 | 最小 | 6.0 | 24.0 | 3.0 | 0.24 | |||||
| 最大 | 0.03 | 1.2 | 0.02 | 0.035 | 0.8 | 8.0 | 26.0 | 5.0 | 0.32 |
Mechanical Properies of ASTM A790 S32750
| 等级 | 拉伸强度 Ksi（兆帕） | 屈服强度 Ksi（兆帕） | 伸长率（%） | 布氏硬度（HBW） | 洛氏 C（HRC） |
| S32205 | ≥116(800) | ≥80(550) | ≥15 | ≥300 | ≥32 |
ASTM A790 的壁厚公差
| 外径范围 | t/D 比率 | 壁厚公差 | |
| 下(-) | 完毕(+) | ||
| 1/8"~2 1/2" (包括) | 全部 | 12.5% | 20% |
| 3"~18"（包括） | t/D 高达 5% 包括 | 12.5% | 22.5% |
| >18"（包括） | t/D up > 5% Incl. | 12.5% | 15% |
| >18 "焊接 | 全部 | 12.5% | 17.5% |
| >18 "无缝 | t/D 高达 5% 包括 | 12.5% | 22.5% |
| t/D up > 5% Incl. | 12.5% | 15% | |
用途和应用：
1>.Oil and gas industry: ASTM A790 S32750 is widely used in the oil and gas industry for applications such as offshore platforms， subsea pipelines， and oil and gas processing equipment.
2>.Chemical processing industry: The excellent corrosion resistance of ASTM A790 S32750 makes it suitable for use in chemical processing equipment such as reactors， heat exchangers， and tanks.
3>.Desalination plants: ASTM A790 S32750 is used in desalination plants for its excellent resistance to corrosion and high strength.
Pulp and paper industry: The high strength and corrosion resistance of ASTM A790 S32750 make it suitable for use in pulp and paper processing equipment such as digesters and bleach towers.
4>.Marine industry: ASTM A790 S32750 is used in the marine industry for applications such as shipbuilding， offshore platforms， and seawater desalination.
