Tha ASTM A182 F304 snàithlean snàithlean snàithlean, a 'dèanamh nipples le aon t-snàthainn deireannach agus an t-lann ceann eile. The other shape of nipples are threaded full nipples,which are both ends with thread.Pipe nipples also have sock weld connection,they are similar to threaded nipples,the only difference is threaded nipples use thread,while SW nipples use socket welded.