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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.+ U8 J1 b4 F9 n' M4 t& H
关于美规的,可以参考CSA NO 68 and UL 1450的35~37节写得很明白.& f8 m' v$ T: u
如:! O% {" g/ M: o, o$ O( c! N/ R! i. @
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 `% c, n" o2 c9 B: c8 {3 C3 |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.
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3 {3 Y9 M, `: A% B- l7 `3 p37.1 A compressor system with an air-holding tank shall be provided with:
- I/ ], V; o+ u0 f: Ta) A pressure-regulating control switch that complies with the requirements in 37.2, to limit
1 J# ?! o% R' g- ~4 Qpressure build-up within the tank;' b7 E5 Q7 b+ u" H6 T
Exception: A switch need not be provided on a product that uses other means of limiting tank
* L. t( R1 e$ X: Gpressure, such as an air dumping valve or a compressor design that inherently limits pressure.
& D! z1 }6 O2 c) N1 X, sb) A pressure gauge or other equivalent device to indicate when pressure is retained within the
5 b9 [/ R- ^" h" _1 ntank. A product with a pressure indicator that is not calibrated in pressure units shall be marked7 y5 r, O" @/ X& |; b+ Z9 h
in accordance with 61.1.9. |
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