JB/T 4268-1999 Specification for fabrication of bicolor water gauges
1 Scope
This standard is applicable to the fabrication and acceptance of bicolor water gauges for power station boilers, industrial boilers or containers with nominal pressure PN≤32MPa, working pressure P≤22MPa and working temperature t≤330℃.
2 Normative References
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. At time of publication, the editions indicated were valid. All normative documents are subject to revision, and 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.
GB/T 4622.1-1993 Specification and symbol of spiral wound gaskets
GB/T 4622.2-1993 Spiral wound gaskets for steel pipe flanges - Dimensions
GB/T 4622.3-1993 Specification of spiral wound gaskets
GB/T 9222-1988 Strength calculation of pressure parts for watertube boilers
JB/T 106-1978 Valves marking and paint
JB/T 1615-1991 Painting and packing specification of boiler
JB/T 2248-1977 Tooth gaskets for high temperature and high pressure flanges
JB/T 3595-1993 Specifications for valves for power station
JB/T 6617-1993 Specification of flexible graphite ring for valves
JB/T 9625-1999 Specification for pressure retaining casting of boiler pipe fittings
JB/T 9626-1999 Specification for boiler forging
JC 225-1981 DST3 transparent quartz glass tubes
JG 67-1982 Rubber asbestos packing
JG 68-1982 Oil impregnated asbestos packing
JG 76-1975 Mica for boiler water level gauge
QB 776-1980 Glass plate and glass tube for liquid level gauge
Steam boiler safety technology supervisory regulations (1996)
3 Pressure ratings
PN1.6MPa, PN2.5MPa, PN4.0MPa, PN6.4MPa, PN10MPa, PN16MPa, PN20MPa, PN25MPa, PN32MPa.
