1、 MSS SP-123-2013 Non-Ferrous Threaded and Solder-Joint Unions for Use with Copper Water Tube Standard Practice Developed and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE Vienna, Virginia 22180-4602 Phone: (703) 281-6613 Fax: (703)
2、 281-6671 E-mail: standardsmss-hq.org MSS www.mss-hq.org MSS STANDARD PRACTICE SP-123 i This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 201 and the MSS Coordinating Committee. The content of this Standard Practice is the resulting efforts of competent and
3、experienced volunteers to provide an effective, clear, and non-exclusive standard that will benefit the industry as a whole. This MSS Standard Practice describes minimal requirements and is intended as a basis for common practice by the manufacturer, the user, and the general public. The existence o
4、f an MSS Standard Practice does not in itself preclude the manufacture, sale, or use of products not conforming to the Standard Practice. Mandatory conformance to this Standard Practice is established only by reference in other documents such as a code, specification, sales contract, or public law,
5、as applicable. MSS has no power, nor does it undertake, to enforce or certify compliance with this document. Any certification or other statement of compliance with the requirements of this Standard Practice shall not be attributable to MSS and is solely the responsibility of the certifier or maker
6、of the statement. “Unless indicated otherwise within this MSS Standard Practice, other standards documents referred to herein are identified by the date of issue that was applicable to this Standard Practice at the date of approval of this MSS Standard Practice (see Annex B). This Standard Practice
7、shall remain silent on the validity of those other standards of prior or subsequent dates of issue even though applicable provisions may not have changed.” By publication of this Standard Practice, no position is taken with respect to the validity of any potential claim(s) or of any patent rights in
8、 connection therewith. MSS shall not be held responsible for identifying any patent rights. Users are expressly advised that determination of patent rights and the risk of infringement of such rights are entirely their responsibility. In this Standard Practice all text, notes, annexes, tables, figur
9、es, and references are construed to be essential to the understanding of the message of the standard, and are considered normative unless indicated as “supplemental“. All appendices, if included, that appear in this document are construed as “supplemental“. Note that supplemental information does no
10、t include mandatory requirements. Substantive changes in this 2013 edition are “flagged” by parallel bars as shown on the margins of this paragraph. The specific detail of the change may be determined by comparing the material flagged with that in the previous edition. Non-toleranced dimensions in t
11、his Standard Practice are nominal unless otherwise specified. Excerpts of this Standard Practice may be quoted with permission. Credit lines should read Extracted from MSS SP-123-2013 with permission of the publisher, Manufacturers Standardization Society of the Valves and Fittings Industry. Reprodu
12、ction and/or electronic transmission or dissemination is prohibited under copyright convention unless written permission is granted by the Manufacturers Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. Originally Published: August 1998 Current Edition Approved: Ma
13、y 2012 (Updated April 2013) Current Edition Published: May 2013 MSS is a registered trademark of Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Copyright , 2013 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STA
14、NDARD PRACTICE SP-123 ii TABLE OF CONTENTS SECTION PAGE 1 SCOPE . 1 2 PRESSURE-TEMPERATURE RATINGS . 1 3 ABBREVIATIONS 1 4 DESCRIPTION 1 5 MATERIALS . 2 6 SIZE . 2 7 DESIGN . 2 8 LAYING LENGTHS . 3 9 SIZE . 3 10 DESIGN . 3 11 LAYING LENGTHS . 3 TABLE 1 Terminology of Parts 1 2 Pressure-Temperature R
15、atings and Tensile Testing . 4 3 Dimensions of Wrought Solder Joint Fittings 5 4 Dimensions of Cast Solder Joint Fittings . 6 A1 Pressure-Temperature Ratings of Solder and Brazed Joints 8 FIGURE 1 Union Designs and Drawings . 7 ANNEX A Strength of Solder and Brazed Joints 8 B Referenced Standards an
16、d Applicable Dates 9 MSS STANDARD PRACTICE SP-123 1 1. SCOPE This Standard Practice covers copper and copper alloy unions with metal-to-metal seating, in nominal sizes 1/4 through 4, with solder-joint or threaded end connections, and for use with copper water tube that is compliant with ASTM B88. In
17、cluded in this Standard Practice are: a) Pressure-temperature ratings b) Abbreviations for end connections c) Size and method of designating openings of fittings d) Markings e) Materials f) Dimensions and tolerances g) Tests 2. PRESSURE-TEMPERATURE RATINGS 2.1 Ratings of Unions Unions manufactured t
18、o this Standard Practice may be used for the same pressure-temperature ratings as annealed, straight, seamless ASTM B88 Type L copper water tube. 2.2 Bursting Strength The actual bursting strength of the union shall not be less than the computed bursting strength of annealed, Type L copper water tub
19、e. 2.3 Rating of Solder Joint The safe working pressure-temperature rating for a solder-joint piping system is dependent not only on fitting and tube strength, but also on the composition of the solder used for the joint. Pressure-temperature ratings for solder joints are given in Annex A. 3. ABBREV
20、IATIONS 3.1 The following symbols are used to designate the type of fitting end: Symbol Definition C = Solder joint fitting end made to receive copper tube diameter (female) FTG = Solder joint fitting end made to copper tube diameter (male) FPT = Internal (female) American National Standard Taper Pi
21、pe Thread (NPT), as per ASME B1.20.1 MPT = External (male) American National Standard Taper Pipe Thread (NPT), as per ASME B1.20.1 4. DESCRIPTION 4.1 The complete union shall consist of three parts (1) male, (2) female, and (3) nut. Equivalent terms are itemized in Table 1. TABLE 1 Terminology of Pa
22、rts Preferred Term Equivalent Terms Male Male Seat End, Tail Piece, Nut Piece, Coupling, Ball End Female Female Seat End, Thread Piece, Body, Head, Cone End Nut Union Coupling Nut, Swivel, Ring NON-FERROUS THREADED AND SOLDER-JOINT UNIONS FOR USE WITH COPPER WATER TUBE MSS STANDARD PRACTICE SP-123 2
23、 5. MATERIALS 5.1 Components of unions shall be made from wrought copper or cast copper alloys. 5.2 Wrought copper components shall be made from copper UNS designations C10200, C12000, or C12200, or copper alloy UNS C23000, for which allowable stresses are found in ASME B31.1 or B31.9. 5.3 Cast copp
24、er alloy components shall be made to meet the requirements of ASTM B62 Alloy C83600, or the chemical and tensile requirements of ASTM B584 Alloys C83800 or C84400, and in other respects comply with the requirements of ASTM B62. 5.4 Other copper alloys may be used provided they meet the chemical requ
25、irements of 60% minimum copper and provided the components produced from the copper alloy materials meet all the mechanical and corrosion resistant properties for the end purposes of the unions. 5.5 The chemical composition of the materials used shall not contain anything that inhibits the joining t
26、o tube or other fittings. 5.6 The use of materials, other than those listed above in Sections 5.2 and 5.3, is the responsibility of the user. 6. SIZE 6.1 The sizes of solder-joint end connections shall correspond to the standard water tube sizes, as defined in ASTM B88. The sizes of the threaded end
27、s shall correspond to nominal pipe sizes, as defined in ASME B1.20.1. 7. DESIGN 7.1 General 7.1.1 The union design and materials of construction shall be structurally suitable for the stated pressure ratings and temperature limits. Any additional metal thickness above the thickness necessary to cont
28、ain pressure such as that needed for assembly stresses, stress concentrations and corrosion allowances, shall be determined by the manufacturer. 7.1.2 The complete union shall consist of male, female, and nut components. The type of joint shall be metal-to-metal seating surface with ball-to-cone, ba
29、ll-to-ball, or ball-and-socket configuration. The male and female components shall be designed for external and internal NPT tapered pipe threads or as solder-joint connections. Typical designs are shown in Figure 1. 7.1.3 The wrenching section of internal threaded ends shall be polygonal, and the w
30、renching section of external threaded ends shall be furnished with a polygon or flats, at the manufacturers option. 7.2 End Connections 7.2.1 Threaded pipe ends shall have taper pipe threads in accordance with ASME B1.20. 1. 7.2.2 Solder-joint ends shall conform to the dimensional requirements shown
31、 in Table 3 (wrought) and Table 4 (cast). 7.3 Cast Metal Thickness 7.3.1 Dimensional variation may occur in the casting process. Pattern equipment shall be designed to produce the metal thickness given for cast components in Table 4. The minimum cast wall thickness shall not be less than 90 percent
32、of the body and joint wall thickness, as shown in Table 3. 7.4 Ovality 7.4.1 Maximum ovality shall not exceed 1% of the maximum diameters shown in Table 3 (wrought) and Table 4 (cast). The average of the maximum and minimum diameters must be within the dimensions shown in the applicable Table. MSS S
33、TANDARD PRACTICE SP-123 3 7.5 Hydrostatic Strength 7.5.1 As proof of design, assembled unions shall be capable of withstanding, without rupture or any leakage through the shell or sealing joint, an internal hydrostatic pressure of 112times the value given in Table 2. 7.5.2 The test fluid shall be wa
34、ter, or liquids with a viscosity no greater than that of water. The test fluid temperature shall be below 100 F. The duration of the test shall be for a minimum period of one (1) minute. 7.6 Tensile Strength 7.6.1 As proof of design, assembled unions shall be capable of withstanding, without failure
35、, the tensile load given in Table 2. 7.6.2 Tensile tests shall be conducted by attaching threaded bars or tubing to each end of the union, using the threaded ends provided or by brazing rod or tubing to each end of the union, using the solder joints provided. Bars or tubing are to be securely mounte
36、d in a tensile testing machine using spherical seated adapters to minimize non-axial loading. Tensile loading shall be increased at a uniform rate until-failure load is attained. 8. LAYING LENGTHS 8.1 Due to widely varying manufacturing processes, meaningful laying length dimensions of unions cannot
37、 be established. Consult the manufacturer for these dimensions. 9. ASSEMBLY TORQUE 9.1 It is recognized that required assembly torque is dependent upon the design characteristics of the seal. It is the responsibility of the manufacturer to determine the appropriate assembly torque required to meet t
38、he pressure-temperature ratings of the system. 10. TESTING 10.1 Pressure testing is not required by this Standard Practice. 11. MARKING 11.1 Each union shall be permanently marked with the manufacturers name or trademark in accordance with MSS SP-25. Marking may be omitted from any union where it ma
39、y damage soldering or threaded surfaces. MSS STANDARD PRACTICE SP-123 4 TABLE 2 Pressure-Temperature Ratings and Tensile Testing Standard Water Tube Size Rated Internal Working Pressure (PSI) Minimum Tensile Testing Force (Pounds) 0 to 150 (F) 200 (F) 250 (F) 300 (F) 350 (F) 400 (F) 1/4 775 729 729
40、714 608 456 1,000 3/8 662 623 623 610 519 389 1,400 1/2 613 577 577 565 481 361 2,000 5/8 537 505 505 495 421 316 3,600 3/4 495 466 466 456 388 291 5,500 1 420 395 395 387 330 247 6,800 114373 351 351 344 293 219 8,900 112347 327 327 320 272 204 11,000 2 309 291 291 285 242 182 14,000 212285 269 269
41、 263 224 168 20,000 3 270 254 254 248 211 159 23,000 312258 243 243 238 202 152 25,000 4 249 235 235 230 196 147 27,000 MSS STANDARD PRACTICE SP-123 5 TABLE 3 Dimensions of Wrought Solder Joint Fittings(a)Dimensions are in inches Standard Water Tube Size(b)Male End Female End Wall Thickness T Inside
42、 Diameter of Fitting O Outside Diameter A Length K Inside Diameter F Depth G Min. Max.(c)Min Min. Max.(c)Min Min. Min. 1/4 0.373 0.376 0.38 0.377 0.381 0.31 0.023 0.30 3/8 0.497 0.501 0.44 0.502 0.506 0.38 0.026 0.39 1/2 0.622 0.626 0.56 0.627 0.631 0.50 0.029 0.52 5 /8 0.747 0.751 0.69 0.752 0.756
43、0.62 0.031 0.63 3/4 0.872 0.876 0.81 0.877 0.881 0.75 0.033 0.74 1 1.122 1.127 0.97 1.128 1.132 0.91 0.040 0.98 114 1.372 1.377 1.03 1.378 1.382 0.97 0.044 1.23 1121.621 1.627 1.16 1.628 1.633 1.09 0.051 1.47 2 2.121 2.127 1.41 2.128 2.133 1.34 0.059 1.94 2122.621 2.627 1.53 2.628 2.633 1.47 0.067 2
44、.42 3 3.121 3.127 1.72 3.128 3.133 1.66 0.075 2.89 3123.621 3.627 1.97 3.628 3.633 1.91 0.086 3.37 4 4.121 4.127 2.22 4.128 4.133 2.16 0.096 3.84 NOTES: (a) Drawings and designs of fittings are illustrative only. Dimensions herein shall govern in all cases. (b) For size designation of fittings, see
45、Section 6. (c) For ovality, see Section 7.4. MSS STANDARD PRACTICE SP-123 6 TABLE 4 Dimensions of Cast Solder Joint Fittings(a)Dimensions are in inches Standard Water Tube Size(b)Male End Female End Cast Metal Thickness(d)Inside Diameter of Fitting O Outside Diameter A Length K Inside Diameter F Dep
46、th G Body T Joint K Min. Max.(c)Min Min. Max.(c)Min (d) (d) Min. 1/4 0.373 0.376 0.38 0.377 0.381 0.31 0.08 0.05 0.30 3/8 0.497 0.501 0.44 0.502 0.506 0.38 0.09 0.05 0.39 1/2 0.622 0.626 0.56 0.627 0.631 0.50 0.09 0.05 0.52 5 /8 0.747 0.751 0.69 0.752 0.756 0.62 0.09 0.05 0.63 3/4 0.872 0.876 0.81 0
47、.877 0.881 0.75 0.10 0.05 0.74 1 1.122 1.127 0.97 1.128 1.132 0.91 0.11 0.07 0.98 1141.372 1.377 1.03 1.378 1.382 0.97 0.12 0.07 1.23 1121.621 1.627 1.16 1.628 1.633 1.09 0.13 0.08 1.47 2 2.121 2.127 1.41 2.128 2.133 1.34 0.15 0.09 1.94 2122.621 2.627 1.53 2.628 2.633 1.47 0.17 0.10 2.42 3 3.121 3.1
48、27 1.72 3.128 3.133 1.66 0.19 0.11 2.89 3123.621 3.627 1.97 3.628 3.633 1.91 0.20 0.12 3.37 4 4.121 4.127 2.22 4.128 4.133 2.16 0.22 0.13 3.84 NOTES: (a) Drawings and designs of fittings are illustrative only. Dimensions herein shall govern in all cases. (b) For size designation of fittings, see Sec
49、tion 6. (c) For ovality, see Section 7.4. (d) For cast metal thickness tolerance, see Section 7.3. MSS STANDARD PRACTICE SP-123 7 FIGURE 1 Union Designs and Drawings These drawings are illustrative only. They are not intended to exclude any design meeting this Standard Practice. MSS STANDARD PRACTICE SP-123 8 ANNEX A Strength of Solder and Brazed Joints* This Annex is an integral part of this Standard Practice and is placed after the main text for convenience. The maximum pressure-temperature ratings for solder joints made with copper tube and wrought copper an
