《泄压阀的最低要求外文翻译.doc》由会员分享，可在线阅读，更多相关《泄压阀的最低要求外文翻译.doc（12页珍藏版）》请在三一办公上搜索。
1、MINIMUM REQUIREMENTS FORPRESSURE RELIEF VALVESUG-136(a) Mechanical RequirementsUG-136(a) (1) the design shall incorporate guiding arrangements necessary to ensure consistent operation and tightness.UG-136(a) (2) The spring shall be designed so that the full lift spring compression shall be no greate
2、r than 80% of the nominal solid defection. The permanent set of the spring (dened as the difference between the freeheight and height measured 10 min after the spring has been compressed solid three additional times after presetting at room temperature) shall not exceed 0.5% of the free height.UG-13
3、6(a)(3) Each pressure relief valve on air, water over 140F (60C), or steam service shall have a substantial lifting device， which when activated will release the seating force on the disk when the pressureRelief valve is subjected to a pressure of at least 75% of the set pressure of the valve. Pilot
4、 operated pressure relief valves used on these services shall be provided with either a lifting device as described above or means for connecting and applying pressure to the pilot adequate to verify that the moving parts critical to proper operation are free to move.UG-136(a) (4) the seat of a pres
5、sure relief valve shall be fastened to the body of the pressure relief valve in such a way that there is no possibility of the seat lifting.UG-136(a) (5) in the design of the body of the pressure relief valve, consideration shall be given to minimizing the effects of deposits.UG-136(a) (6) Pressure
6、relief valves having screwed inlet or outlet connections shall be provided with wrenching surfaces to allow for normal installation without damaging operating parts.UG-136(a) (7) Means shall be provided in the design of all pressure relief valves for use under this Division for sealing all initial a
7、djustments which can be made without disassembly of the valve. Seals shall be installed by the Manufacturer or Assembler at the time of initial adjustment. Seals shall be installed in a manner to prevent changing the adjustment without breaking the seal. For pressure relief valves larger Than NPS 1|
8、2 (DN 15), the seal shall serve as a means of identifying the Manufacturer Or Assembler making the initial adjustment.UG-136(a) (8) If the design of a pressure relief valve is such that liquid can collect on the discharge side of the disk, except as permitted in (a)(9) below, the valve shall be equi
9、pped with a drain at the lowest point where liquid can collect (for installation, see UG-135).UG-136(a) (9) Pressure relief valves that cannot be equipped with a drain as required in (a) (8) above because of design or application may be used provided:(a) The pressure relief valves are used only on g
10、as service where there is neither liquid discharged from the valve nor liquid formed by condensation on the discharge side of the valve; and(b) the pressure relief valves are provided with a cover or discharge piping per UG-135(f) to prevent liquid or other contaminant from entering the discharge si
11、de of the valve; and(c) The pressure relief valve is marked FOR GAS SERVICE ONLY in addition to the requirements of UG-129.UG-136(a) (10) for pressure relief valves of the diaphragm type, the space above the diaphragm shall be vented to prevent a buildup of pressure above the diaphragm. Pressure rel
12、ief valves of the diaphragm type shall be designed so that failure or deterioration of the diaphragm material will not impair the ability of the valve to relieve at the rated capacity.UG-136(b) Material SelectionsUG-136(b) (1) Cast iron seats and disks are not permitted.UG-136(b) (2) Adjacent slidin
13、g surfaces such as guides and disks or disk holders shall both be of corrosion resistant material. Springs of corrosion resistant material or having a corrosion resistant coating are required. The seats and disks of pressure relief valves shall be of suitable material to resist corrosion by the uid
14、to be contained.NOTE: The degree of corrosion resistance, appropriate to the intendedservice, shall be a matter of agreement between the manufacturer andThe purchaser.UG-136(b)(3) Materials used in bodies and bonnets or yokes shall be listed in Section II and this Division.Carbon and low alloy steel
15、 bodies, bonnets, yokes and bolting (UG-20) subject to in-service temperatures colder than 20F(30C) shall meet the requirements of UCS-66, unless exempted by the following.(a) The coincident ratio dened in Fig. UCS-66.1 is 0.35 or less.(b) The material(s) is exempted from impact testing per Fig. UCS
16、-66.UG-136(b) (4) Materials used in nozzles, disks, and other parts contained within the external structure of the pressure relief valves shall be one of the following categories:(a) Listed in Section II;(b) listed in ASTM specications;(c) Controlled by the Manufacturer of the pressure relief valve
17、by a specication ensuring control of chemical and physical properties and quality at least equivalent to ASTM standards.UG-136(c) Inspection of Manufacturing and/or Assembly of Pressure Relief ValvesUG-136(c)(1) A Manufacturer or Assembler shall demonstrate to the satisfaction of a representative fr
18、om an ASME designated organization that his manufacturing, production, and testing facilities and quality control procedures will insure close agreement between the performance of random production samples and the performance of those valves submitted for Capacity Certication.UG-136(c) (2) Manufactu
19、ring, assembly, inspection, and test operations including capacity are subject to inspections at any time by a representative from an ASME designated organization.UG-136(c) (3) A Manufacturer or Assembler may be granted permission to apply the UV Code Symbol to production pressure relief valves capa
20、city certied in accordance with UG-131 provided the following tests areSuccessfully completed. This permission shall expire on the fth anniversary of the date it is initially granted. The permission may be extended for 5 year periods if the following tests are successfully repeated within the 6-mont
21、h period before expiration.(a) Two sample production pressure relief valves of a size and capacity within the capability of an ASME accepted laboratory shall be selected by a representative from an ASME designated organization.(b) Operational and capacity tests shall be conducted in the presence of
22、a representative from an ASME designated organization at an ASME accepted laboratory. The pressure relief valve Manufacturer or Assembler shall be noticed of the time of the test and may have representatives present to witness the test. Pressure relief valves having an adjustable blow down construct
23、ion shall be adjusted by the Manufacturer or Assembler following successful testing for operation but prior to ow testing so that the blow down does not exceed 7% of the set pressure or 3 psi (20 kPa), whichever is greater. This adjustment may be made on the ow test facility.(c) Should any pressure
24、relief valve fail to relieve at or above its certied capacity or should it fail to meet performance requirements of this Division, the test shall be repeated at the rate of two replacement pressure relief valves, selected in accordance with (c)(3)(a) above, forEach pressure relief valve that failed.
25、(d) Failure of any of the replacement pressure relief valves to meet the capacity or the performance requirements of this Division shall be cause for revocation within 60 days of the authorization to use the Code Symbol on that particular type of pressure relief valve. During this period, the Manufa
26、cturer or Assembler shall demonstrate the cause of such decadency and the action taken to guard against future occurrence, and the requirements of (c) (3) above shall apply.UG-136(c) (4) Use of the Code Symbol Stamp by an Assembler indicates the use of original, unnoticed parts in strict accordance
27、with the instructions of the Manufacturer of the pressure relief valve.(a) An assembler may transfer original and unnoticed pressure relief parts produced by the Manufacturer to other Assemblers provided the following conditions are met:(1) Both Assemblers have been granted permission to apply the V
28、 or UV Code Symbol to the specic valve type in which the parts are to be used;(2) The Quality Control System of the Assembler receiving the pressure relief valve parts shall dene the controls for the procurement and acceptance of those parts; and(3) The pressure relief valve parts are appropriately
29、packaged, marked, or sealed by the Manufacturer to ensure that the parts are:(a) Produced by the Manufacturer; and(b) The parts are original and unnoticed. However, an Assembler may convert original nished parts by machining to another nished part for a specic application under the following conditi
30、ons:(1) Conversions shall be specied by the Manufacturer. Drawings and/or written instructions used for part conversion shall be obtained from the Manufacturer and shall include a drawing or description of the converted Part before and after machining.(2) The Assemblers quality control system, as ac
31、cepted by a representative from an ASME designated organization, must describe in detail the conversion of original parts, provisions for inspection and acceptance, personnel training, and control of current ManufacturersDrawings and/or written instructions.(3) The Assembler must document each use o
32、f a converted part and that the part was used in strict accordance with the instructions of the Manufacturer.(4) The Assembler must demonstrate to the Manufacturer the ability to perform each type of conversion. The Manufacturer shall document all authorizations granted to perform part conversions.
33、The ManufacturerAnd Assembler shall maintain a le of such authorizations.(5) At least annually a review shall be performed by the Manufacturer of an Assemblers system and machining capabilities. The Manufacturer shall document the results of these reviews. A copy of this documentation shall be kept
34、on le by the Assembler. The review results shall be made available to a representative from an ASME designated organization.UG-136(c) (5) In addition to the requirements of UG-129, the marking shall include the name of the Manufacturer and the nalAssembler. The Code Symbol Stamp shall be that of the
35、 nal Assembler.NOTE: Within the requirements of UG-136(c) and (d): A Manufacturer is dened as a person or organization who is completely responsible for design, material selection, capacity cortication, manufacture of all component parts, assembly, testing, sealing, and shipping of pressure relief v
36、alves credited under this Division. An Assembler is dened as a person or organization who purchases or receives from a Manufacturer or another Assembler the necessary component parts or pressure relief valves and assembles, adjusts, tests, seals, and ships pressure relief valves credited under this
37、Division, at a geographical location other than and using facilities other than those used by the Manufacturer. An Assembler may be organizationally independent of a Manufacturer or may be wholly or partly owned by a Manufacturer. UG-136(d) Production Testing by Manufacturers and AssemblersUG-136(d)
38、 (1) each pressure relief valve to which the Code Symbol Stamp is to be applied shall be subjected to the following tests by the Manufacturer or Assembler. A Manufacturer or Assembler shall have a documented program for the application, calibration, and maintenanceOf gages and instruments used durin
39、g these tests.UG-136(d)(2) The primary pressure parts of each pressure relief valve exceeding NPS 1 (DN 25) inlet size or 300 psi (2100 MPa) set pressure where the materials used are either cast or welded shall be tested at a pressureOf at least 1.5 times the design pressure of the parts. These test
40、s shall be conducted after all machining operations on the parts have been completed. There shall be no visible sign of leakage.UG-136(d) (3) the secondary pressure zone of each closed bonnet pressure relief valve exceeding NPS 1 (DN 25) inlet size when such pressure relief valves are designed for d
41、ischarge to a closed system shall be testedWith air or other gas at a pressure of at least 30 psi (200 kPa). There shall be no visible sign of leakage.UG-136(d) (4) each pressure relief valve shall be tested to demonstrate its popping or set pressure. Pressure relief valves marked for steam service
42、or having special internal parts for steam service shall be tested with steam, except that pressure relief valves beyond the capability Of the production steam test facility either because of size or set pressure may be tested on air. Necessary corrections for differentials in popping pressure betwe
43、en steam and air shall be established by the Manufacturer and applied to the popping point on air. Pressure relief valves marked for gas or vapor may be tested with air. Pressure relief Valves marked for liquid service shall be tested with water or other suitable liquid. When a valve is adjusted to
44、correct for service conditions of superimposed back pressure, temperature, or the differential in popping pressure between steam and air, the actual test pressure (cold differential test pressure) shall be marked on the valve perUG-129. Test xtures and test drums where applicable shall be of adequat
45、e size and capacity to ensure that pressure relief valve action is consistent with the stamped set pressure within the tolerances required by UG-134(d).UG-136(d) (5) after completion of the tests required by (d) (4) above, a seat tightness test shall be conducted. Unless otherwise designated by a Ma
46、nufacturers published pressure relief valve specication or another specication agreed to by the user, the seat tightness test and acceptance criteria shall be in accordance with API 527.UG-136(d) (6) Testing time on steam pressure relief valves shall be sufficient, depending on size and design, to i
47、nsure that test results are repeatable and representative of held performance.UG-136(e) Design Requirements. At the time of the submission of pressure relief valves for capacity cortication, or testing in accordance with (c) (3) above, the ASME designated organization has the authority to Review the
48、 design for conformity with the requirements of UG-136(a) and UG-136(b) and to reject or require medication of designs which do not conform, prior to capacity testing.UG-136(f) Welding and Other Requirements.All welding, brazing, heat treatment, and nondestructive examination used in the constructio
49、n of bodies, bonnets, and yokes shall be performed in accordance with the Applicable requirements of this Division.Selections from：ASME BOILER AND PRESSURE VESSEL CODE AN INTERNATIONAL CODE泄压阀的最低要求UG(a)136机械需求 UG 136(a)（1）设计应纳入指导和进行必要安排以确保一致的行动 和密封性。UG 136（a）（2）弹簧的设计应使全面弹力压缩不大于固体变形尺寸的80%弹簧的残余变形（定义是：在室温下预先设定后，弹簧的自由高度与常温强压处理后压并三次再放开10min后测量的高度之差）不得超过自由高度的0.5 UG 136（a）（3）每个泄压阀，在空气中，超过1
