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1楼错误，欧洲简单压力容器是否涵盖是依压力大小(BAR)乘以储气罐容积(L)是否大于50来确定的．3 d) ]+ k- `9 R' O" ~! B
关于美规的，可以参考CSA NO 68 and UL 1450的35~37节写得很明白．) u# Q$ e. f6 a0 U9 ]. B
如：
4 ]; d c3 c* d8 r% g+ F8 E35.1.8 When the unit is in its normal operating position, the drain hole shall be provided in the lowest portion of a pressure vessel. The hole shall be a threaded hole of not smaller than 1/4-inch NPT and shall be provided with a removable plug or piping to a drain cock. The system shall have provision for gravity or pressure drainage of the vessel.
2 t( s/ O/ D8 B# c$ @$ `4 ~36.5 A vessel having an inside diameter of more than 3 inches (76 mm) and subject to air or steam pressure generated or stored within the product shall be protected by a pressure-relief device.& w+ s" H; k7 J& f. {9 o$ i
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37.1 A compressor system with an air-holding tank shall be provided with:" M7 ~4 t2 F2 J% L! u @( R; L
a) A pressure-regulating control switch that complies with the requirements in 37.2, to limit% `: _& e" X0 a2 I; T
pressure build-up within the tank;# ~7 ?$ q+ {' B5 `
Exception: A switch need not be provided on a product that uses other means of limiting tank2 _5 X7 i5 T0 _; \* l( x8 o
pressure, such as an air dumping valve or a compressor design that inherently limits pressure.
7 U' X" W" x; Q* m: o+ Gb) A pressure gauge or other equivalent device to indicate when pressure is retained within the5 l" z3 h' f- r( y% E2 c5 Z+ M% I
tank. A product with a pressure indicator that is not calibrated in pressure units shall be marked
8 f4 _, {; R u- T9 Y# z+ {3 n1 j. Jin accordance with 61.1.9. |
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发表于 2009-2-3 17:04
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发表于 2009-3-19 12:37
