| 标准 |
GB |
| 中学或没有 |
是次要的 |
| 合金或者不是 |
是合金做的 |
we are manufacturer of fin tube,spiral fin tube ,if you are need,please contact me for detailed. Specification:Chinese GB standard or equivalent ASTM standard Material: carbon steel, alloy Bare tube size:OD25mm-OD180mm Fins Pitch: 4mm-30mm Fins Height: 5mm-30mm Fin thickness:1-3mm The size of the finned tube can be discused with the client's requirements.Welcome to contact us. Our products are used wildly on domestic and exported, approved byLRS,BV,ABS, etc classification societies, and go down well with numerous customers. .