Standards

  • ASTM A193 A193M Standard nkọwapụta maka Alloy-Steel na igwe anaghị agba nchara Bolting maka elu okpomọkụ ma ọ bụ High Pressure Service na ndị ọzọ Special Nzube
  • ASTM A320 A320M Standard nkọwapụta maka Alloy-Steel na igwe anaghị agba nchara Bolting maka Low-okpomọkụ Service
  • ASTM A325M-09 Standard nkọwapụta maka Structural n'ise, Steel, Okpomọkụ Mesoo 830 MPa Opekempe ike ọdụdọ
  • ASTM A563M Standard nkọwapụta maka Carbon na Alloy Steel Mkpụrụ (metric)