标题: 美标测试电压力锅的内容 [打印本页] 作者: twtwx 时间: 2012-7-1 12:07 标题: 美标测试电压力锅的内容 请问各位高人UL1026中关于电压力锅测试内容在哪章中，请指只？作者: fasten 时间: 2012-7-1 15:48
29 Pressure Vessels and Parts Subject to Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . .41 - |$ o% O; q7 x8 L- z- I' k29.1 Except as noted in 29.2, a pressure vessel having an inside diameter of more than 6 inches (152 M. e$ x l; Q+ w. I7 Dmm) and subject to a gauge pressure of more than 15 lbf/in2 (103 kN/cm2) shall be certified by the9 l; E: L5 t" P% B/ L/ x
National Board of Boiler and Pressure-Vessel Inspectors and marked in accordance with the appropriate3 o& j1 f+ W/ B0 }0 ?* W9 V
boiler and pressure vessel code symbol of the American Society of Mechanical Engineers (ASME) (²H², h; l- [. W' @1 R, k0 `1 {
²M², ²S², or ²U²) for a working pressure not less than the pressure determined by applying 29.3. ! ~, ~( V9 F. P. z' ^29.2 If a pressure vessel, because of its application, is not covered under the inspection procedures of , a$ q- w, K9 E vthe ASME code, it shall be designed and constructed so that it complies with the requirements in 29.3.8 h* M/ @; H( R* [1 M( i
29.3 Except as noted in 29.4 and 29.5, a part that is subject to air or vapor pressure (including the vapor % R6 {4 W$ l! ^3 |: i A6 C+ U5 a( mpressure in a vessel containing only a superheated fluid) during normal or abnormal operation shall" X6 U/ f" ~# X+ P% F- Z% I$ B1 E* R
withstand without bursting or leaking a pressure equal to the highest of the following that is applicable: 8 P& h! V8 s* [9 ]: Ja) Five times the pressure corresponding to the maximum setting of a pressure-reducing valve . r9 H( i0 K* @& o. P5 o) xprovided as part of the assembly, but no more than five times the marked maximum supply 1 D9 T( k# d& t0 f! q/ epressure from an external source and no more than five times the pressure setting of a1 |" J1 C( S& F6 n! i
pressure-relief device provided as part of the assembly., x, @- b7 ^, j! k
b) Five times the marked maximum supply pressure from an external source, except as ( J3 V; M8 v; F" D# u z2 r# T$ Bprovided in (a).6 G( o4 h& f$ l/ O+ @- l1 b. ^
c) Five times the pressure setting of a pressure-relief device provided as part of the assembly. ) [. _. D5 q% Q3 ld) Five times the maximum pressure that can be developed by an air compressor that is part of * u' N3 }1 g7 W& q* z1 |0 p7 Wthe assembly, unless the pressure is limited by a pressure-relief device in accordance with (a). * ? T& [3 \ D5 Oe) Five times the working pressure marked on the part.5 F6 D A e/ r4 J# ?
29.4 A test need not be performed to determine whether a part complies with the requirement in 29.3 if2 [) z6 ` W9 j+ n
study and analysis indicate that the strength of the part is adequate for the purpose as a result of its + E" a1 a( N0 [, x0 J, a! e$ b$ vmaterial and dimensions – for example, copper or steel pipe of standard size and provided with standard ' k7 h+ Z- i+ @( P# K7 nfittings might be considered to have adequate strength. # `9 d& B+ V2 j9 O29.5 A pressure vessel bearing the ASME code inspection symbol (²H², ²M², ²S², or ²U²) is considered, B, ~+ s6 K% j2 [& w/ g
to comply with the requirement in 29.3 if the vessel is marked with a value of working pressure not less ' z" Q, {5 w, Lthan that to which it is subject during normal or abnormal operation.+ K2 B( i2 x' w
29.6 If a test is necessary to determine whether a part complies with the requirement in 29.3, two samples9 G' J+ e3 ^) P( J7 E: o! } ]# l
of the part are to be subjected to a hydrostatic-pressure test. Each sample is to be filled with water as to2 |2 E) h6 | Q# ^
exclude air and is to be connected to a hydraulic pump. The pressure is to be raised gradually to the 0 ]' k9 u, t0 ]$ F: vspecified test value and is to be held at that value for 1 minute. The results are not acceptable if either , w: F7 I& o+ x2 Q/ gsample bursts or leaks, except as indicated in 29.7. 9 b$ }$ M$ s; z* z29.7 Leakage at a gasket during the hydrostatic-pressure test is not unacceptable unless it occurs at a, y7 T4 T2 v* u4 g' x
pressure 40 percent or less of the required test value. # ]. y7 T& L/ j! x4 x29.8 A means for relieving pressure shall be provided for all parts in which pressure might be generated & z, _ s o- C) pin the event of fire. ( f4 c! I H. N% Z6 p29.9 Pressure-relief devices (see 29.15), fusible plugs, soldered joints, nonmetallic tubing, or other+ F( A3 L- Z7 b5 z2 I
pressure-relief means or the equivalent may be employed to comply with the requirements in 29.8. : P+ S( Z% M4 H29.10 There shall be no shut-off valve between the pressure-relief means and the parts that it is intended o; d7 Z' [1 G# T i7 b5 cto protect.7 ?0 n, x% `4 ` `
29.11 A vessel having an inside diameter of more than 3 inches (76.2 mm) and subject to air or steam ' l- @+ z8 O$ S3 ppressure generated or stored within the appliance shall be protected by a pressure-relief device./ U/ J: m/ o3 L) Y1 ?% }( O3 {
29.12 The start-to-discharge pressure setting of the pressure-relief device shall not be higher than the % d" C3 ~* [8 d5 p: N- o5 nworking pressure marked on the vessel. The discharge rate of the device shall acceptably relieve the# R% r( |0 b% O7 x
pressure.* f% J( |& D0 f- q+ E- i
29.13 A pressure-relief device shall comply with all four of the following: _: x+ I- | H o/ ra) Shall be connected as close as possible to the pressure vessel or parts of the system that it; w3 K5 a( S+ _ n
is intended to protect; `' ]" l3 m, i' Q
b) Shall be installed so that it is readily accessible for inspection and repair and cannot be; }/ K" B1 u- W- ~2 y/ g
readily rendered inoperative;/ K3 K, t: \1 Q9 B' q+ Q3 F* A9 ] |% N
c) Shall have its discharge opening located and directed so that the risk of scalding is reduced ) C+ [. K' U( }& a7 Q" x; ato a minimum; and) R8 p, Y' r' g* f9 y
d) Shall have its discharge opening located and directed so that operation of the device does % j, L0 F+ l/ r1 D( L" U8 D3 tnot deposit moisture on bare live parts or on insulation or components affected detrimentally by ' F2 B+ z3 D* F2 Xmoisture. : [6 j* d0 c$ h; z0 ]29.14 A pressure-relief device having an adjustable setting shall be judged on the basis of its maximum 0 d% I# M% I3 s6 D% X4 usetting unless the adjusting means is sealed at a lower setting.0 i$ W8 T2 Z! t
29.15 A pressure-relief device is considered to be a pressure-actuated valve or rupture member intended$ m6 ^# ^- v. D! S+ B3 ~" }! M, \
to relieve excessive pressures automatically.9 b. E, |# `' ?- N- G" M
29.16 Where a pressure relief device is required, the control responsible for limiting the pressure in the8 S0 B$ m9 b/ F* q& m8 _
vessel shall be capable of performing under rated load for 100,000 cycles of operation and shall prevent $ Y! G# x* P/ g6 P/ L) sthe pressure from exceeding 90 percent of the relief device setting under any condition of normal - `. ]8 y8 b9 i1 `* e6 L+ loperation.作者: twtwx 时间: 2012-7-3 08:38
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