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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 y* A Q2 ~! ~$ h7 } K
关于美规的，可以参考CSA NO 68 and UL 1450的35~37节写得很明白．6 P3 n! i {. u! n% b
如：
- l! ^! p: R' c+ F4 z# U+ y. O! l35.1.8 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.. i- @* \6 C9 j! R
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.! i0 W' E7 H# p9 ~
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37.1 A compressor system with an air-holding tank shall be provided with:
5 a U) x! S9 ^0 j+ Ea) A pressure-regulating control switch that complies with the requirements in 37.2, to limit+ K0 X$ U' U* t3 @; x
pressure build-up within the tank;
, j! s; O" V# J: P* h5 HException: A switch need not be provided on a product that uses other means of limiting tank; d* Y/ v K+ J a0 @
pressure, such as an air dumping valve or a compressor design that inherently limits pressure.
* [7 f# q% O- _2 \4 [( Z1 c& l& pb) A pressure gauge or other equivalent device to indicate when pressure is retained within the
: Y" T+ ?' b: P4 dtank. A product with a pressure indicator that is not calibrated in pressure units shall be marked- T8 k& v4 H: \% j! `1 Z' a5 ^+ y
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