Marine blank steel flanges
1 Scope
This standard specifies the classification, requirements, test methods and inspection rules, as well as the marking, packaging and storage of marine blank steel flanges (hereinafter referred to as “blank flanges”) with the connection dimensions meeting those specified in GB/T 569 and GB/T 2501.
This standard is applicable to the design, manufacturing and acceptance of blank flanges whose nominal pressure is no greater than 1.6MPa and whose media are air, seawater, freshwater and oil as well as steam with a working temperature not exceeding 300℃.
2 Normative references
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections), or revisions, of any of these publications do not apply to this standard. However, parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document applies.
GB/T 569 Marine pipe flanges - Connection dimensions and mating face
GB/T 700-2006 Carbon structural steels
GB 712-2000 Hull structural steel
GB/T 1184-1996 Geometrical tolerancing - Geometrical tolerance for features without individual tolerance indications (eqv ISO 2768-2:1989)
GB/T 1958 Geometrical product specifications (GPS) - Geometrical tolerance - Verification
GB/T 2501 Marine pipe flanges - Connection dimensions and mating face
Foreword i
1 Scope
2 Normative references
3 Classification
4 Requirements
5 Test methods
6 Inspection rules
7 Marking, packaging and storage
