2 Normative References

The following normative documents contain provisions which,through reference in this text,constitute provisions of this national standard.For dated references,subsequent amendments to,or revisions of,any of these publications do not apply.However,parties to agreements based on this International 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 referred to applies.

GB/T 9112 Types and parameters for steel pipe flanges

GBZ 1-2002 Hygienic standards for the Design of Industrial Enterprises

HG/T 20592 Steel pipe flanges(PN designated)

HG/T 20615 Steel pipe flanges(Class designated)

HG/T 20623 Large diameter steel pipe flanges(Class designated)

SH 3406 Steel pipe flanges for petrochemical industry

SH/T 3156-2009 Engineering specification of pumps-shaft sealing systems of centri-fugal and rotary pumps for petrochemical industry

SH/T 3149-2007 Engineering specification of general purpose steam turbines in petrochemical industry

ISO 1940 Mechanical Vibration-Balance Quality Requirements of Rigid Rotors

ISO 10438 Petroleum,Petrochemical and Natural Gas Industries-Lubrication,shaftsealing and control-oil systems and auxiliaries(Identical with API Std 614)

ISO 13709-2003 Centrifugal Pumps for Petroleum,Petrochemical and Natural Gas Industries(Identical with API Std 610-2004)

ISO 21049-2004 Pumps-Shaft Sealing Systems for Centrifugal and Rotary Pumps(Identical with API Std 682-2004)

ASME B16.1 Cast Iron Pipe Flanges and Flanged Fittings Classes 25,125,and 250

ASME B16.5 Pipe Flanges and Flanged Fittings NPS 1/2 through NPS 24

ASME B16.42 Ductile Iron Pipe Flanges and Flanged Fittings Classes 150 and 300

ASME B16.47 Large Diameter Steel Flanges NPS 26 through NPS 60

EN 1092-1 Flanges and their Joints-Circular Flanges for Pipes,Valves,Fit-tings and Accessories,PN Designated-Part 1 Steel Flanges

EN 1092-2 Flanges and their Joints-Circular Flanges for Pipes,Valves,Fit-tings and Accessories,PN Designated-Part 2 Cast Iron Flanges