1、 MSS SP-119-2010 Factory-Made Wrought Belled End Pipe Fittings for Socket-Welding Standard Practice Developed and Approved by the Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. 127 Park Street, NE Vienna, Virginia 22180 Phone: (703) 281-6613 Fax: (703) 281-6671 e-mail
2、: infomss-hq.org www.mss-hq.org MSS STANDARD PRACTICE SP-119i This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 113 and the MSS Coordinating Committee. The content of this Standard Practice is the result of the efforts of competent and concerned volunteers t
3、o provide an effective, clear, and non-exclusive specification that will benefit the industry as a whole. This MSS Standard Practice is intended as a basis for common practice by the manufacturer, the user, and the general public. The existence of an MSS Standard Practice does not in itself preclude
4、 the manufacture, sale, or use of products not conforming to the Standard Practice. Mandatory conformance is established only by reference in a code, specification, sales contract, or public law, as applicable. “Unless otherwise specifically noted in this MSS Standard Practice, other standards refer
5、red to herein are identified by the date of issue that was applicable to this Standard Practice at the date of issue of this Standard Practice. See Annex A. This Standard Practice shall remain silent on the applicability of those other standards of prior or subsequent dates of issue even though appl
6、icable provisions may not have changed. References contained herein which are bibliographic in nature are noted as supplemental in the text.” In this Standard Practice all notes, annexes, tables, and figures are construed to be essential to the understanding of the message of the Standard Practice,
7、and are considered part of the text unless noted as “supplemental“. All appendices, if included, that appear in this document are construed as “supplemental“. Supplemental information does not include mandatory requirements for this Standard Practice. U.S. customary units in this Standard Practice a
8、re the standard; (SI) metric units are for reference only. This document has been substantially revised from the previous 1996 and 2003 editions. It is suggested that if the user is interested in knowing what changes have been made, that direct page by page comparison should be made of this document
9、. Any part of this Standard Practice may be quoted. Credit lines should read Extracted from MSS SP-119-2010 with permission of the publisher, Manufacturers Standardization Society of the Valves and Fittings Industry, Inc. Reproduction is prohibited under copyright convention unless written permissio
10、n is granted by Manufacturers Standardization Society of the Valve and Fittings Industry Inc. Originally Approved: November 1996 Originally Published: January 1997 Current Edition Approved: May 2010 Current Edition Published: September 2010 Copyright , 1997, 2003, 2010 by Manufacturers Standardizati
11、on Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-119ii FOREWORD ASME B16.9 is the American Standard for steel butt-welding fittings and although not so stated, it is implied that its scope deals primarily with standard (Schedule 40) wall and heavier as i
12、t was developed for carbon steel and those grades of alloy steel piping that are selected for pressure and temperature considerations. In 1949 ASME approved standard B36.19 for Stainless Steel Pipe in which Schedule 10S was established. Schedule 5S pipe was recognized in the 1952 publication of B36.
13、19. The companion fittings for Schedule 10S pipe used B16.9 shapes and proportions and were standardized by MSS SP-43, which was first published in 1950. In anticipation, the original 1950 edition of MSS SP-43 also standardized Schedule 5S fittings. Since 1950 the use of lighter than standard wall s
14、tainless steel piping in new construction has become predominant. The reasons for this evolution include the rapid expansion of the process industries in the fields of chemicals, plastics, textiles, paper, etc. Coincident with the greater utilization of light wall pipe and of more capable metal form
15、ing machinery, the need to reduce pipe assembly fabrication times brought about by world market competition led to the development of belled end socket welding fittings. As with the development of MSS SP-43, the shapes and proportions for B16.9 were reused for the belled end fitting bodies to the ma
16、ximum extent possible. In 1992 first work on belled end fittings for this Standard Practice included defining socket proportions, socket to fitting body transition geometry, fitting thickness, and determining the ability of U.S. industry to support manufacturing. Some of this work only standardized
17、service proven relationships used in belled end fittings made for the pulp and paper industry without standards for over 20 years. In 1994 the U.S. Navy funded burst and fatigue testing prototype fittings in the first of a two-phase program. The second phase was for an increased thickness fitting an
18、d was never done. In 1995 mid-way through testing, the Navy directed that these belled end fittings be used on ship systems in new construction followed shortly thereafter by direction to use them on the repair of ship systems. The quality and configuration control of these fittings was done by an i
19、nterim document, the requirements of which, with some improvements, are contained herein. In keeping with trends wherein military procurement activities have been using more commercial material standards and because of recognized fabrication economies related to the use of these fittings, the U.S. N
20、avy sponsored the writing of the 1996 edition of this Standard Practice in cooperation with fitting manufacturers. This Standard Practice established dimensional uniformity for light wall belled end socket welding fitting designs qualified by burst and fatigue testing for Military Service and qualif
21、ied by burst testing for Commercial Code Practice. The most significant changes in the 2003 revision included the following: 1) A new definition for allowable pressure ratings for MP fittings (Section 6), which adopts the B16.9 format rating the fitting the same as the connecting pipe of the same sc
22、hedule; 2) The addition of titanium and aluminum fitting materials; and 3) The addition of the Supplementary Requirements (Section 18, now 17), which supports Navy special requirements. The most significant changes in this 2010 revision include the following: 1) The extension of the SCOPE to include
23、 heavier wall fittings; 2) The relocation of the CR fitting requirements from the body of the Standard Practice to that of a Supplementary Requirement; 3) The addition of all the combinations of reducing fittings included in B16.9; and, 4) The addition of a reference line on the socket end to enable
24、 inspectors to measure the installation weld length as a Supplementary Requirement. The title of this 2010 revised Standard Practice has also been amended. MSS STANDARD PRACTICE SP-119iii TABLE OF CONTENTS SECTION PAGE 1 SCOPE . 1 2 REFERENCES . 1 3 DEFINITIONS . 1 4 CLASSIFICATIONS . 2 5 PRESSURE R
25、ATINGS 2 6 FITTING DESIGN . 2 7 MANUFACTURING METHOD PROOF TESTING . 3 8 PRODUCTION TESTING 4 9 MATERIALS . 4 10 WELDING AND WELD INSPECTIONS 5 11 FITTING TOLERANCES, DIMENSIONS AND LAY-OUT DISTANCES . 5 12 SOCKET AND COUPLING END FACES . 6 13 PIPE JOINT FILLET WELD . 6 14 FINISH . 6 15 STRESS RELIE
26、VING TREATMENT 7 16 MARKING . 7 17 SUPPLEMENTARY REQUIREMENTS 8 FIGURE 1 Joint Fillet Weld 6 TABLE 1 Fitting Material Classes . 11 2 Tolerances and Minimum Wall Thickness 12 3 Socket Dimensions 13 4 Long (Standard) Radius Elbow Dimensions 14 5 Short Radius Elbow Dimensions . 15 6 Long (Standard) Rad
27、ius Street Elbow Dimensions . 16 7 Short Radius Street Elbow Dimensions . 17 8 Straight Tee Dimensions 18 9 Reducing Branch Tee Dimensions. 19 10 Straight Thermo-well Tee Dimensions 20 11 Angle Thermo-well Tee Dimensions . 21 12 Concentric Reducer Dimensions . 22 13 Concentric Street Reducer Dimensi
28、ons . 23 14 Eccentric Reducer Dimensions 24 15 Cap Dimensions . 25 16 Standard Coupling Dimensions . 26 17 Closure Coupling Dimensions . 27 18 Closure Repair Coupling Dimensions . 28 ANNEX A Referenced Standards and Applicable Dates . 29 MSS STANDARD PRACTICE SP-1191 1. SCOPE 1.1 General This Standa
29、rd Practice covers the design and manufacturing requirements for factory-made wrought belled end pipe fittings for socket-welding formed from either tubular sections or flat material. Included are the overall dimensions, tolerances, materials, socket end details, heat treatment, marking and other re
30、quirements for belled end fittings in sizes NPS 1/2through 12. The requirements for these belled end fittings are stipulated into each of two pressure service classes: 1.1.1 Class MP for stainless steel fittings for use with ASTM A312 pipe; for titanium fittings for use with ASTM B861 or B862 pipe;
31、and aluminum fittings for use with ASTM B241 pipe. 1.1.2 Class MARINE for copper nickel fittings for use with Military Specification MIL-T-16240 pipe or ASTM B466 or B467 pipe. 1.2 Partial Compliance Fittings This Standard Practice may be used to specify Partial Compliance (PC) fittings by agreement
32、 between the manufacturer and purchaser. Special considerations include, but are not limited to: dimensions; such as unlisted reducing tee outlet size combinations, or end shapes; such as a street end tee, or custom tolerances. When such fittings meet all other stipulations of this Standard Practice
33、, they shall be considered as being in Partial Compliance herewith, provided they are appropriately marked (see Section 16). 1.3 Fitting Shapes and Types Not Covered This Standard Practice does not cover the design or construction of laterals, wyes, mitered elbows, tees of notch and point or saddle
34、weld types, sweep elbows, sweep tees or any other fitting not described herein by sketch and table. 1.4 Service Conditions This Standard Practice does not cover the criteria for selection of fitting type or fitting materials suitable for a particular fluid type or service. 1.5 Installation Welding T
35、his Standard Practice does not cover installation-welding requirements. Installation welding shall be done in accordance with the applicable piping system into which the fittings are installed. Pipe joint weld geometry suggestions contained in Section 13 reflect the proportions used in the fatigue t
36、ests conducted on pipe pieces used to qualify these fittings for Navy service. 2. REFERENCES 2.1 General Standards and specifications adopted by reference in this Standard Practice are shown in Annex A, for the convenience of identifying edition number, date and source of supply. 3. DEFINITIONS 3.1
37、General Wrought Belled End Fittings for Socket Welding add the advantages of socket welding joints to ASME B16.9 shape butt-welding fittings. In this Standard Practice, “wrought“ is used to denote fittings formed from tubular or flat starting materials as opposed to those, which are either forged or
38、 cast to their final shape or machined from forgings or castings. 3.2 CuNi CuNi is a notation representing copper-nickel alloy. The two most common alloys are 90/10 and 70/30. The most commonly used pipe specification is MIL-T-16420. 3.3 Electro-etching Electro-etching is an electro-chemical marking
39、 process, which consists of an electrical power unit that delivers current to a marking head. The marking head is covered with a pad that has FACTORY-MADE WROUGHT BELLED END PIPE FITTINGS FOR SOCKET-WELDING MSS STANDARD PRACTICE SP-1192 been saturated with any one of several electrolytes formulated
40、for marking various metals. When the marking head touches the fitting, the current and electrolyte flow through a stencil resulting in the replacement of metallic ions with a metal oxide forming an etched mark. 3.4 Controlled Dot Peen Controlled dot peen is a mechanical process using a carbide stylu
41、s to create a controlled depth dot matrix impression in the metal being marked. 3.5 Heat Identification Number The manufacturers heat identification number traces the starting material to a heat number or a lot number. 3.6 Symbols Reference The definition reference for symbols and abbreviations is M
42、SS SP-96. 3.7 Factory-made Factory-made means production facilities, manufacturing methods (using tools, dies, jigs and fixtures), and inspection procedures to a quality control system of a standard line of socket weld fittings. 4. CLASSIFICATIONS 4.1 General Fittings in full compliance of this Stan
43、dard Practice shall be one of two classes: MP or MARINE. The classes are specified in Table 1 for ready reference and comparison. Fittings of Class MP shall be further subdivided into four subclasses; specifically: MP-S, MP-W, MP-WX, and MP-WU, each reflecting unique manufacturing processes and insp
44、ection requirements. 4.2 Special Class Fittings Class CR fittings are described in the SR (Supplementary Requirements) section of this Standard Practice. CR Class fittings shall have the same exterior dimensions as MP and MARINE fittings, but thickness, manufacturing methods and quality control insp
45、ection requirements shall be as agreed between the manufacturer and a purchaser. 4.3 Subclass Substitution If the purchaser does not define a MP subclass, the manufacturer may supply any MP subclass. 5. PRESSURE RATINGS 5.1 Class MP Ratings The allowable pressure ratings for Class MP fittings design
46、ed in accordance with this Standard Practice may be calculated as for straight seamless pipe of equivalent material (as shown by comparison of composition and mechanical properties in the respective material specifications) in accordance with the rules established in the applicable section(s) of the
47、 ASME B31 Code for Pressure Piping. For the calculation, applicable data for the NPS, wall thickness class or schedule number and material equivalent to that of the fitting material shall be used. NPS, wall thickness class or schedule number and the material identity on the fittings are in lieu of p
48、ressure rating markings. 5.2 Class MARINE Ratings The allowable pressure rating for Class MARINE fittings shall be the same as those for the MIL-T-16420 Class tube with which it identifies. 5.3 Rating Certification The pipe fitting manufacturer certifies that its pipe fittings comply with this Stand
49、ard Practice when its name or trademark is marked on the body of the fitting. 6. FITTING DESIGN 6.1 Design Qualification The pressure retaining designs of Class MP or MARINE fittings are qualified simultaneously with the qualifications of manufacturing methods for each fitting design and those qualifications shall be by proof test (see Section 7). 6.2 Minimum Thickness The minimum wall thickness of each fitting shall be the same as the minimum wall of the pipe or tube with which it identifies. In addition, in order to meet proof test and/or manufacturing process requirements, some
