ASME法兰在什么情况下必须要用锻件

665612

新人设计员一枚，刚接触ASME，法兰能不能车出来，什么情况下必须要用锻件？请各位大神告知！感谢！

lyklzy

1) ASME B16.5-2017 Pipe Flanges and Flanged Fittings   NPS ½ Through NPS 24  Metric/Inch Standard
        ------
5 MATERIALS
5.1 General
   (a) Materials required for flanges and flanged fittings are listed in Table 1A with the following restrictions:
       (1) Plate and flat bar materials may be used only for blind flanges and reducig flanges without hubs.
       (2) Flanges and flanged fittings shall be manufactured as one piece in accordance with the applicable material specification. Assembly of multiple pieces into the
            finished product by welding or other means is not permitted by this Standard.
   (b) Each forged flange shall be finished from apart that is brought as nearly as practicable to the finished shape and size by a compressive plastic hot-working operation
        that consolidates the material to produce an essentially wrought structure, and shall be so processed during the operation as to cause metal flow in the direction
        most favorable for resisting the stress encountered in service.
          ------

2) ASME B16.47-2017 Large Diameter Steel Flanges  NPS 26 Through NPS 60 Metric/Inch Standard
         ------
5 MATERIALS
5.1 General
    (a) Materials required for flanges are listed in Table 1 with the restriction that plate materials shall be used only for blind flanges. Flanges shall be manufactured as one
         piece in accordance with the applicable material specification. Assembly of multiple pieces into the finish product by welding or other means is not permitted by this Standard.
    (b) Each forged flange shall be finished from a part that is brought as nearly as practicable to the finished shape and size by a compressive plastic hot working operation
         that consolidates the material to produce an essentially wrought structure, and shall be so processed during the operation as to cause metal flow in the direction
         most favorable for resisting the stresses encountered in service.
         ------

gl9855

法兰是需要车、镗、钻加工而成，锻件相比铸件在承压方面好。我们这管汇上的配件，35MPa用铸件或锻件、70MPa以上必须用锻件。

665612

gl9855 发表于 2018-6-6 13:42
法兰是需要车、镗、钻加工而成，锻件相比铸件在承压方面好。我们这管汇上的配件，35MPa用铸件或锻件、70MPa ...

我们公司最大才做24MPA 一般都是0.8~1.6MPA 法兰不需要锻件的吧

阿谢克那·李

665612 发表于 2018-6-6 15:12
我们公司最大才做24MPA 一般都是0.8~1.6MPA 法兰不需要锻件的吧

本公司1.6MPA 法兰用的是锻件

tailakefish

ASME法兰，除了BLIND FLG.可以用板材，其余只能用锻件（厚板材卷制情况除外）。

waftmaple

同意5L的观点，大多数情况下都要用锻件加工

dljdw

多数情况下都必须使用锻件，见AS ME B16.5。

HaoEngineer

我建议你直接读标准先，凡事都要有依据。而不是单单听某人说，当然别人说的时候说出了标准出处例外。

zmh721222

可以先看一下GB150-2011  7.1.4     P183页。希望有所帮助。

我是定位销

不是很懂，来学习一下。