Tekanyetso ea liphaephe tsa ERW ke tse latelang: API 5L, ASTM A53 B, ASTM A178, ASTM A500/501, ASTM A691, ASTM A252, ASTM A672 API 5L Standard e ikemiselitse ho sebelisa khase le metsi indastering ea oli le khase bakeng sa litšupiso, e sebelisetsoang phala ea tšepe e se nang seamless le phala ea tšepe e cheselitsoeng, ho kenyeletsoa boema-kepe bo tloaelehileng le boema-kepe, boema-kepe ba sokete ea phala ...
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