Gradd DUR:
BS 1387: Dosbarth A, Dosbarth B, Dosbarth C
EN10210/EN10219: S235, S235JR, S235J2H, S275, S275JR, S355JRH, S355J2H
API 5L: GR.A, GR.B, X42, X46, X52, X56, X60, X65 X70
ASTM A53: GR.A, GR.B
ASTM A252: GR.1, GR.2, GR.3
ASTM A500: GR.A, GR.B, GR.C, GR.D
GB/T9711: L175, L210, L245, L290, L320, L360, L290, L320, L360, L390, L415, L450, L485, L555
GB/T3091, SY/T5037: C195, C215, Q235, Q275, Q295, Q345
llinell gynhyrchu: prawf deunydd crai--weldio tab diwedd--bwydo plât--crimpio ymyl--blat ymyl UT{5}}melino ymyl a beveling{6 }}crimpio ymyl--ffurfio--tac weld a thrwsio-dadusting wal fewnol--y tu mewn i weldio--y tu allan i weldio-tynnu tab diwedd a slag--prawf UT --prawf pelydr-X weldio a phibell--ehangu mecanyddol--profi hydrostatig--llifanu pen pibell--syth a chryndod--wynebau diwedd a beveling{21}}prawf UT--weldio a phrawf pelydr-X pibellau--archwiliad terfynol-- paentio a marcio--storio--cyflenwi.
Tagiau poblogaidd: weldio pibell haearn du
