How to mark the inner diameter B1 of the socket weld flange SW?
Thread Content
In the dimension table for socket-welded flanges specified in HG/T20615-2009, it is noted that the inner diameter B1 of the flange is determined by the wall thickness of the steel pipe; the user should specify this value when placing the order or determine it according to Appendix C of the standard. The inner diameter B1 of the table-mounted flange corresponds to a steel pipe wall thickness of Sch40. My question is: how should the flange be specified when using steel pipes with other wall thicknesses?
Write the pipeline wall thickness series directly, SCH XXX.