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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．
7 |8 b( `" p- ~8 O+ q关于美规的，可以参考CSA NO 68 and UL 1450的35~37节写得很明白．
2 ]' `+ j2 g1 |! J! o) |. {如：
. T; T# \7 X1 S35.1.8 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.0 ~$ a1 I' l4 S! \, q
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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- X3 d+ U* a2 j" [2 r$ U" ~ z o37.1 A compressor system with an air-holding tank shall be provided with:& [" Q f8 l$ q: Y, V* `! A1 x
a) A pressure-regulating control switch that complies with the requirements in 37.2, to limit
" }4 K% M2 b: g |pressure build-up within the tank;
0 Z' y% l2 z% U/ q5 K' ]Exception: A switch need not be provided on a product that uses other means of limiting tank6 ]" C& \, q" V) H2 ?' j+ v/ `8 }- i
pressure, such as an air dumping valve or a compressor design that inherently limits pressure.1 c1 m0 C/ e$ ?5 P
b) A pressure gauge or other equivalent device to indicate when pressure is retained within the8 P0 n! A8 b6 L2 }
tank. A product with a pressure indicator that is not calibrated in pressure units shall be marked
; G/ s& I& t0 K+ Nin accordance with 61.1.9. |
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