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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．- p4 T2 W+ ?% h* |2 z; L( I
关于美规的，可以参考CSA NO 68 and UL 1450的35~37节写得很明白．
% p% L( N5 S6 M$ N如：; W2 g1 X, e# \# u$ c* f! H
35.1.8 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.
3 O; L9 T! ]* V# V* _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.; g7 @% a0 f0 w, @/ r9 v+ B
( c, ^, y$ M7 Y3 F/ ]8 `) V$ o. Q37.1 A compressor system with an air-holding tank shall be provided with:
4 y8 w. L( `9 {; Q% A. d( s$ S9 K% g! xa) A pressure-regulating control switch that complies with the requirements in 37.2, to limit, @- Z+ v, i8 u' x, g- h5 u( f/ a
pressure build-up within the tank;
6 A+ t7 c( _6 ^: o/ g" LException: A switch need not be provided on a product that uses other means of limiting tank
* P' G. w$ L7 S7 gpressure, such as an air dumping valve or a compressor design that inherently limits pressure. E r. D. c# h
b) A pressure gauge or other equivalent device to indicate when pressure is retained within the0 b# M) g& g% p% a
tank. A product with a pressure indicator that is not calibrated in pressure units shall be marked0 y5 i T8 P7 K% B; ?6 _ a
in 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
