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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.
% g& _ O, K- t5 H9 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.. i! m& k( y8 B/ F J2 |
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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.( ~" Y. E5 K" z3 w- e3 B T7 Y( e
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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" g7 C/ J* w$ ^9 }37.1 A compressor system with an air-holding tank shall be provided with:
{1 [% H1 ~9 ]0 wa) A pressure-regulating control switch that complies with the requirements in 37.2, to limit
7 [6 ?% w$ G, p6 \3 \8 v2 |pressure build-up within the tank;6 W$ Y+ W k- s
Exception: A switch need not be provided on a product that uses other means of limiting tank
- k+ c k& y! P0 s7 i9 x, wpressure, such as an air dumping valve or a compressor design that inherently limits pressure.
# T1 E, w6 m4 k8 tb) A pressure gauge or other equivalent device to indicate when pressure is retained within the: n" T" t# T. l; r& g; N% G$ f; g
tank. A product with a pressure indicator that is not calibrated in pressure units shall be marked
) a6 Y( ]$ f7 Y$ W2 ^) ein accordance with 61.1.9. |
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