Flat Head Riveted Nuts
1 Subject content and application scope
This standard specifies product classification, technical requirements, test methods, inspection rules, marking and packaging for steel bulkhead pipe penetrations with flange connection sizes as per GB 569 and GB 2501 (hereinafter referred to as “pipe penetration”).
This standard is applicable to marine piping systems conveying seawater, fresh water, fuel oil and air at temperatures not exceeding 300°C for steam ships.
2 Normative references
GB 569 Marine pipe flanges—Connection dimensions and mating face
GB 2501 Marine pipe flanges—Connection dimensions and mating face
GB 5312 Carbon and carbon-manganese steel seamless steel tubes and pipes for ship
3 Product classification
3.1 The models of bulkhead pipe penetrations are specified as follows:
Model A—flange connection size as per stud-fixed bulkhead pipe penetrations according to GB 569;
Model AS—flange connection size as per stud-fixed bulkhead pipe penetrations according to GB 2501;
Model AH—flange connection size as per stud-fixed thickened bulkhead pipe penetrations according to GB 569;
Model AHS—flange connection size as per stud-fixed thickened bulkhead pipe penetrations according to GB 2501;
Model B—flange connection size as per weld-fixed bulkhead pipe penetrations according to GB 569;
Model BS—flange connection size as per weld-fixed bulkhead pipe penetrations according to GB 2501;
Model BH—flange connection size as per weld-fixed thickened bulkhead pipe penetrations according to GB 569;
Model BHS—flange connection size as per weld-fixed thickened bulkhead pipe penetrations according to GB 2501;
Model C—flange connection size as per stud-fixed bulkhead pipe penetrations according to GB 569;
Model CS—flange connection size as per stud-fixed bulkhead pipe penetrations according to GB 2501;
Model CH—flange connection size as per stud-fixed thickened bulkhead pipe penetrations according to GB 569;
Model CHS—flange connection size as per stud-fixed thickened bulkhead pipe penetrations according to GB 2501;
Model D—flange connection size as per weld-fixed butting bulkhead pipe penetrations according to GB 569;
Model DS—flange connection size as per weld-fixed butting bulkhead pipe penetrations according to GB 2501;
1 Subject content and application scope
2 Normative references
3 Product classification
4 Technical requirements
5 Test methods and inspection rules
6 Marking and packaging
Additional explanation:
