Paipu irin ti a fi weld, ti a tun mọ si paipu welded, jẹ paipu irin ti a ṣe welded pẹlu awo irin tabi irin rinhoho lẹhin crimping.Ni gbogbogbo, ipari jẹ 6 m.Paipu irin welded ni awọn anfani ti ilana iṣelọpọ ti o rọrun, ṣiṣe iṣelọpọ giga, ọpọlọpọ awọn oriṣiriṣi ati awọn pato ati idoko-owo ohun elo ti o kere ju, ṣugbọn agbara gbogbogbo rẹ kere ju ti paipu irin alailẹgbẹ.Awọn paipu welded pẹlu iwọn ila opin nla tabi ti o nipọn ni gbogbogbo jẹ ti irin òfo taara, lakoko ti awọn paipu welded kekere ati awọn paipu welded tinrin nikan nilo lati wa ni welded taara nipasẹ ṣiṣan irin.