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发表于 2009-12-14 10:47
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来自: 中国山东烟台
Category of pipe bending 弯管的种类。
(1) Cold bending (by bending machine): 冷弯(用弯管机)
Application for both carbon steel pipe and stainless steel pipes up to 150A for wall thickness Std.. & SCH.40 & SCH.80. 可用在DN150及以下、壁厚是SCH40、8及STD 标准的碳钢及不锈钢管
Copper pipes up to 80A. 铜管要小于80A
Normally, all pipes except those described below to be bent by mean of cold bending machine with bend radius of approximately 3 times and over the pipes outside diameter.弯曲半径通常为管通径三倍。
(2) Hot bending: 热轧
Steel pipes 80A to 750A for SCH.40, SCH.80, SCH.160, STD. Hot bending should be approved by owner. Only inductive heating in view of bending to be used. Annealing shall be for minimum 5 minutes above 500C.
热轧可用于通径80A到750A 壁厚SCH.40, SCH.80, SCH.160, STD 的钢管,退火应在500C以上最少保持5分钟。
5.2 Elbow 弯头
Short radius elbow and/or long radius elbow are used where it is difficult to make piping arrangement with the above cold and hot bending pipes. 不能冷轧或热轧弯头的地方应该用弯头。 |
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