1、 ANSI/FCI 79-1-2009 AMERICAN NATIONAL STANDARD STANDARD FOR PROOF OF PRESSURE RATINGS FOR PRESSURE REGULATORS ANSI/FCI 79-1 Fluid Controls Institute, Inc. Sponsor: Fluid Controls Institute, Inc. 1300 Sumner Ave Cleveland, Ohio 44115-2851ANSI/FCI 79-1-2009 AMERICAN NATIONAL STANDARD Standard for Proo
2、f of Pressure Ratings for Pressure Regulators Sponsor Fluid Controls Institute, Inc. iiCONTENTS PAGE Foreword .iv 1. Scope 1 2. Definitions .1 3. General .1 4. Test Procedure .2-4 5. Marking 4 iiiivForeword (The foreword and history are included for information purposes). This Fluid Controls Institu
3、tes (FCI) voluntary standard establishes guidelines for proof-of-design testing of pressure regulators used in the fluid controls industry. It is not intended for use in the routine production testing of regulators shells, which is covered by ANSI / FCI 4-1. This voluntary standard was developed as
4、a cooperative effort of the manufacturers in the Regulator Section of the FCI to assist manufacturers, users and specifiers of pressure regulators. This standard is not intended to supersede existing standards for regulators for specific applications such as those for gas appliance pressure regulato
5、rs, for high pressure regulators for gas cylinders, or for fluid power regulators in machinery operations. See FCI 86-2 for definitions of regulator types. This standard was originally adopted as an FCI standard May 16, 1979. The standard has been periodically revised and the latest revision was app
6、roved in July, 2003. FCI recognizes the need to periodically review and update this standard. Suggestions for improvement should be forwarded to the Fluid Controls Institute, Inc., 1300 Sumner Avenue, Cleveland, Ohio, 44115-2851. All constructive suggestions for expansion and revision of this standa
7、rd are welcome. The existence of a Fluid Controls Institute (FCI) standard does not in any respect preclude any member or non-member from manufacturing or selling products not conforming to this standard nor is the FCI responsible for its use. ANSI/FCI 79-1-2009 AMERICAN NATIONAL STANDARD Standard f
8、or Proof of Pressure Rating for Pressure Regulators1. SCOPE 1.1 This standard describes the recommended proof testing of pressure regulators for operation at or below the manufacturers rated pressure. 1.2 The purpose of this standard is to create common guidelines for establishing pressure ratings f
9、or use by manufacturers, users, specifiers and approval bodies in order to provide consistent pressure containment integrity. 2. DEFINITIONS 2.1 A pressure regulator as covered by this standard is a self contained and powered device that serves to automatically maintain a pressure at a controlled va
10、lue. 2.2 Specified minimum tensile strength is that called for in the material specification or the users order. 2.3 The test specimen is a sample taken from the same heat of a pressure retaining component. 2.4 The tensile ratio is the actual tensile strength of the specimen divided by the specified
11、 minimum tensile strength. 2.5 A rupture is the fracture of the pressure boundary, whether leading to a release of pressure in the chamber or not. 2.6 The wall thickness ratio is the actual wall thickness of the test specimen divided by the minimum allowable wall thickness of the test specimen in th
12、e area associated with measured displacement resulting from the hydraulic proof test. 2.7 Rated pressures as established by this standard are those which are specified by the manufacturer based on using the method of 4.5 or 4.10 and can safely be used in normal service without rupture of pressure co
13、ntaining parts, provided the regulators are installed as specified in 3.2. 3. GENERAL 3.1 This standard is limited to proof-of-design testing. It is not intended to cover the testing of duplicate parts of the same materials, designs and construction once a representative single unit has been tested
14、and a pressure rating established by the means specified herein. Some tests are potentially destructive and the regulator under test is not required to be functional after all tests are completed. 3.2 This standard includes pressure regulators which may have two static pressure ratings, one for the
15、portion of the regulator subjected to the inlet pressure and the other for the portion subjected to the outlet pressure. Such regulators should be installed with adequate over-pressure protection equipment to prevent excessive downstream pressure resulting from any system failure. 23.3 The ratings e
16、stablished by this standard are applicable to normal ambient temperatures, 38 to 100F (3 to 38C). Ratings at other temperatures for materials other than cast iron can be calculated by multiplying the test rating by the ratio of allowable stress at operating temperature to the allowable stress at rat
17、ing temperature. Rating of cast iron at elevated temperature shall be determined by provision of ASME B16.1. 3.4 Production units manufactured and rated to be in compliance with this standard shall have the same material multiplier (per Section 4.5) and pressure boundary geometry, independent of end
18、 connections, as the regulator which was tested and rated according to this standard. 3.5 The maximum pressures which can be sustained without damage to the internal parts are not covered in this standard. 3.6 The regulator end connections shall be considered in the overall determination of the pres
19、sure rating. The lesser value of the maximum allowable pressure of the end connection or body rating shall be used. 4. TEST PROCEDURE 4.1 In devices with dual pressure ratings, the valve plug or closure member in the test unit may be replaced with a member designed to isolate the chambers normally s
20、ubjected to inlet pressure from those normally subjected to outlet pressure. 4.2 Exhaust or vent holes may be plugged to conduct a pressure test. 4.3 A flexible part such as a diaphragm, bellows or similar item which cannot perform its function if subjected to proof test pressures as described in 4.
21、5 may be replaced with a stronger, non-functional member during these proof tests. 4.4 If the housing of the production unit contains a spring which produces stress in one or more pressure containing parts, the test unit shall, during the test, contain a spring load equivalent to the maximum load of
22、 the greatest spring rate to be used in the production unit. 4.5 Each pressure containing chamber of the regulator shall be subjected to, and shall withstand without rupture, a hydraulic proof test at the maximum pressure which can exist in that chamber at rated inlet and outlet pressures in normal
23、operation multiplied by one of the following factors: (a) 6.67 for cast iron, multiplied by the tensile ratio of the material (Ref: ASME BPVC Sect. VIII, Division I, UCI-101). (b) 5.0 for cast ductile iron, multiplied by the tensile ratio of the material (Ref: ASME BPVC Sect. VIII, Division I, UCD-1
24、01) divided by the casting efficiency obtained from ASME BPVC, Sec. VIII, Division I, UG-24.). (c) 4.0 for metals other than cast iron and cast ductile iron, multiplied by the tensile ratio of the material (Ref: ASME BPVC, Sect. VIII, Division I, UG-101) divided by the casting efficiency obtained fr
25、om ASME BPVC, Sect. VIII, Division I, UG 24. (d) 4.0 for metals other than cast, multiplied by the tensile ratio of the material (Ref: ASME BPVC Sect. VIII, Division I, UG-101): (e) The values obtained from 4.5(a), (b), (c) and (d) shall be increased for weld joint efficiency (Ref; ASME BPVC Sect. V
26、III, Division I, UW-12) and wall 3thickness ratio (Ref: ASME BPVC Sect. VIII, Division I, UG-101(i), where applicable. Positive material identification (PMI) or other testing shall be performed on the actual test specimen to verify the actual chemical composition meets the applicable material specif
27、ication. 4.6 For tests specified in 4.5, leakage at the gasket, diaphragm joint, packing or adjusting screw is permissible per FCI 70-2 provided the required test pressures defined in 4.5 are reached and maintained in the chambers for a minimum time of three minutes to demonstrate structural integri
28、ty. 4.7 The regulator body and pressure containing parts manufactured with different materials can be pressure tested separately. 4.8 Special high strength bolting may be used for the hydrostatic proof of pressure test if the bolting specified for normal assembly is inadequate to prevent leakage of
29、hydrostatic test pressure after pre-loading and retightening of the standard bolts. If alternate high strength bolting is used, the bolting specified for normal assembly shall be a well defined or established tensile strength, and stress values during normal operation shall be established by calcula
30、tion in compliance with ASME BPVC, Section VIII, Division 1, Appendix 2. 4.9 Maximum allowable stress values to use in calculations in compliance with ASME BPVC Section VIII, Division 1, Appendix 2 can be obtained in ASME BPVC, Section II, Part D. The maximum stress values for materials not listed c
31、an be calculated using the method identified in ASME BPVC, Section II, Part D, Appendix 2. 4.10 The rated pressure may also be determined by a hydrostatic pressure test based on yielding (ASME BPVC, Sect. VIII, Division I, UG-101). The hydrostatic pressure test based on part yielding is limited to m
32、aterials with a ratio of minimum specified yield to minimum specified ultimate strength of 0.625 or less (Ref: ASME BPVC, Sect. VIII, Division I UG-101 (a)2(a) and with a minimum specified elongation equal to or greater than 10%. 4.11 Proof testing of flexible members such as bellows and diaphragms
33、are not covered by this standard. However, for test purposes all such members should have the capability of withstanding the following test pressures: Maximum differential pressure across the diaphragm during normal operating conditions: n = normal differential pressure across the diaphragm Normal D
34、ifferential Pressures Maximum Differential Pressure 300 psig or less n + 100% of n 300 to 600 psig n + 300 psig 600 to 2000 psig n + 50% of n Above 2000 psig n + 1000 psig 4.12 As a functional test of the design, each pressure containing chamber of regulator shall be subjected to withstand for three
35、 minutes without visible leakage a pressure equal to 2.0 times the maximum pressure which can exist in that chamber in normal operation at rated inlet and outlet pressures. For chambers having an operating pressure of 10 psi or less, the test pressure for the chamber shall be at least the maximum op
36、erating pressure plus 10 psi (69 kPa). Bolting will be tightened to torque values representative of those used in production. The test media shall be 4representative of that for the end regulator application, i.e. air for gas regulators and water for liquid regulators. The test may be carried out wi
37、thout internal trim. Chambers separated by diaphragms may be pressurized on both sides of the diaphragm to the same pressure. 5. MARKING 5.1 Regulators shall be legibly marked to show the manufacturers name, direction of flow, and pressure rating or ratings as established by this standard. The infor
38、mation can be cast or stamped on the regulator or can be shown on a secured corrosion resistant data plate. 56While the recommendations for proof testing contained herein are technically sound, it is not intended that they be considered the only method for proof testing of pressure regulators. These
39、 recommendations should not be interpreted as superior to or a standard that would necessarily be preferred in lieu of an engineers design for a particular system. These recommendations for proof testing originate from the collective experience of leading personnel in the fluid control industry, but
40、 must, due to the nature of the responsibilities involved, be presented only as a guide for the use of a qualified designer or engineer. Thus, the Fluid Control Institute, Inc. expressly disclaims any responsibility for damages arising from the use, application or reliance on the recommendations and information contained herein by designers or by engineers.
