1. API RP17A. Design and operation of subsea production systems—General requirements and recommendations(API, Washington, 2006), pp.33-34.
2. ASME B16. 5. Pipe flanges and flanged fittings(ASME, New York, 2009): pp.222-223.
3. ASME . Alternative rules for construction of pressure vessels(ASME, New York, 2007): p.4. 334-4. 336.
4. API 5L. Specification for Line Pipe(API, Washington, 2004): pp.36-45.
5. DIN 2696. Lenticular ring joint gaskets for flanged joints(DIN, Berlin, 1999): pp.2-12.