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( g: P! m2 m9 m5 L
29.1 Except as noted in 29.2, a pressure vessel having an inside diameter of more than 6 inches (152" _" Y5 ?# }; J( z! P" e' j
mm) and subject to a gauge pressure of more than 15 lbf/in2 (103 kN/cm2) shall be certified by the& d6 @5 D, p6 b, O3 V; {
National Board of Boiler and Pressure-Vessel Inspectors and marked in accordance with the appropriate8 _. _. ~1 N0 q0 s
boiler and pressure vessel code symbol of the American Society of Mechanical Engineers (ASME) (²H², " @, X6 B" m" ~( n1 b²M², ²S², or ²U²) for a working pressure not less than the pressure determined by applying 29.3.4 H1 n i! M+ y
29.2 If a pressure vessel, because of its application, is not covered under the inspection procedures of 3 g+ m) | D# Y. Q; E2 V& a& cthe ASME code, it shall be designed and constructed so that it complies with the requirements in 29.3. 0 e5 a# l7 u$ B) J0 u" r* ?29.3 Except as noted in 29.4 and 29.5, a part that is subject to air or vapor pressure (including the vapor " {. m8 F9 e8 t( _pressure in a vessel containing only a superheated fluid) during normal or abnormal operation shall( ~7 D! [ F* ~
withstand without bursting or leaking a pressure equal to the highest of the following that is applicable: * V3 E$ f, c; W$ qa) Five times the pressure corresponding to the maximum setting of a pressure-reducing valve" y5 K1 D4 @% }9 Y1 i3 S
provided as part of the assembly, but no more than five times the marked maximum supply 3 }7 ~' r2 G S% n6 g) gpressure from an external source and no more than five times the pressure setting of a$ p7 H4 @. @8 ?8 a# R
pressure-relief device provided as part of the assembly. * p# I9 R# T! d* jb) Five times the marked maximum supply pressure from an external source, except as6 q, q" Z) q9 u' x4 @3 P! u
provided in (a).3 I* n1 S3 d; l d5 n; ~3 H* ]8 s4 d( D
c) Five times the pressure setting of a pressure-relief device provided as part of the assembly. & t% Q/ m7 Z! L3 |' Ad) Five times the maximum pressure that can be developed by an air compressor that is part of1 X& B6 |( `8 H3 E9 {3 Z3 O
the assembly, unless the pressure is limited by a pressure-relief device in accordance with (a). _- S3 h; C- g7 D* ue) Five times the working pressure marked on the part. + C5 F! n/ b( j29.4 A test need not be performed to determine whether a part complies with the requirement in 29.3 if; u" b% x1 y* ^6 h
study and analysis indicate that the strength of the part is adequate for the purpose as a result of its& j3 N9 D4 }, ~1 G0 ]
material and dimensions – for example, copper or steel pipe of standard size and provided with standard * y$ ~6 a# E. f- B& Ufittings might be considered to have adequate strength.0 }+ {' ~, H0 b* S3 z
29.5 A pressure vessel bearing the ASME code inspection symbol (²H², ²M², ²S², or ²U²) is considered3 }8 o9 J* w H# }
to comply with the requirement in 29.3 if the vessel is marked with a value of working pressure not less % V: p3 E+ B' s: \than that to which it is subject during normal or abnormal operation. " b' C9 K; u9 [( t29.6 If a test is necessary to determine whether a part complies with the requirement in 29.3, two samples: E' z% k8 i9 o! [) o
of the part are to be subjected to a hydrostatic-pressure test. Each sample is to be filled with water as to ) T" l1 ?" h" Z) C4 D% sexclude air and is to be connected to a hydraulic pump. The pressure is to be raised gradually to the2 [$ k" b0 ]3 c
specified test value and is to be held at that value for 1 minute. The results are not acceptable if either : r: u: V' q( ]- Bsample bursts or leaks, except as indicated in 29.7.* z3 A* L: d3 y n3 z! m
29.7 Leakage at a gasket during the hydrostatic-pressure test is not unacceptable unless it occurs at a 8 u, a3 ^( e2 Q1 X0 Npressure 40 percent or less of the required test value. : `' [) M, B3 W29.8 A means for relieving pressure shall be provided for all parts in which pressure might be generated( Z1 L/ q+ @$ U7 i( i7 R4 K
in the event of fire. - K B0 G( K; D& v4 C29.9 Pressure-relief devices (see 29.15), fusible plugs, soldered joints, nonmetallic tubing, or other, w7 M2 l, O, m
pressure-relief means or the equivalent may be employed to comply with the requirements in 29.8. 7 J9 F1 h2 a- a- _: W& T3 l5 l% O29.10 There shall be no shut-off valve between the pressure-relief means and the parts that it is intended/ a! |! W$ n0 d6 {8 s
to protect.5 P; u* V t8 O% `: n0 N" d
29.11 A vessel having an inside diameter of more than 3 inches (76.2 mm) and subject to air or steam 2 w" \ Z# ^+ I3 ]$ p9 Npressure generated or stored within the appliance shall be protected by a pressure-relief device. $ x4 d1 x+ ?, h29.12 The start-to-discharge pressure setting of the pressure-relief device shall not be higher than the" u- _& H7 M6 S+ E" Y
working pressure marked on the vessel. The discharge rate of the device shall acceptably relieve the! ] O. Q: X5 x& n+ |
pressure. $ k' h; J; w# E* J% y* Q/ N% P29.13 A pressure-relief device shall comply with all four of the following: * \0 O- ]* P; ^! g, Da) Shall be connected as close as possible to the pressure vessel or parts of the system that it 0 E2 L: m9 K8 C1 l$ H( p% Jis intended to protect;1 p8 {# r" r, C# M$ @. v0 q+ ]; Q" t$ s
b) Shall be installed so that it is readily accessible for inspection and repair and cannot be ; p- Y1 p- w) V- d: areadily rendered inoperative; 1 O( J' r3 s' kc) Shall have its discharge opening located and directed so that the risk of scalding is reduced 4 [7 G0 C0 u3 z+ ]4 O* ito a minimum; and , G, i, ]( y$ U& r5 Ud) Shall have its discharge opening located and directed so that operation of the device does+ b/ ~# G, `0 i% D
not deposit moisture on bare live parts or on insulation or components affected detrimentally by 4 k9 D, ^+ j" Smoisture.& ?' H* C- g' i% P+ Q
29.14 A pressure-relief device having an adjustable setting shall be judged on the basis of its maximum % w' t r1 Y2 Q q- ]( q; s" q" u! _setting unless the adjusting means is sealed at a lower setting. ( W% p2 o8 E. O( L29.15 A pressure-relief device is considered to be a pressure-actuated valve or rupture member intended 2 t) W4 q7 U l& vto relieve excessive pressures automatically. ( @+ c$ l+ y0 |+ l) Z: q- P" R6 K2 d! O29.16 Where a pressure relief device is required, the control responsible for limiting the pressure in the 0 ?$ I2 E1 }% L! n/ V5 g' N. K" Fvessel shall be capable of performing under rated load for 100,000 cycles of operation and shall prevent - A5 a/ i, T- j' k3 ^* @the pressure from exceeding 90 percent of the relief device setting under any condition of normal " `' J# A" c, c$ v: v0 |- R+ ~operation.作者: twtwx 时间: 2012-7-3 08:38
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