The production and inspection of butt-welded pipe caps follow a series of international and national standards. Major production standards include Chinese national standards GB/T12459, GB/T13401, HG/T21635, HG/T21631, SH3408, SH3409, and GB/T 3287; American standards ANSI/ASME B16.9 and MSS SP 43; Japanese standards JIS B2311, JIS B2312, and JIS B2313; German standards DIN2605, DIN2615, DIN2616, and DIN2617; and European standard EN10253. Material standards mainly refer to ASTM A403.
A butt-welded pipe cap is a pipe fitting welded to the end of a steel pipe to seal the pipe. Its function is similar to that of a pipe plug or end cap.
Common aliases for butt-welded pipe caps include pipe cap, end cap, end cap, cover, pipe cap, and smother. The main difference between blind flanges and weld caps lies in the connection method: blind flanges are usually detachable, while weld caps are welded and generally cannot be detached.