1、 MSS SP-124-2012 Fabricated Tapping Sleeves 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) 281-6671 E-mail: standardsmss-hq.org MSS www.mss
2、-hq.org MSS STANDARD PRACTICE SP-124 i This MSS Standard Practice was developed under the consensus of the MSS Technical Committee 112 and the MSS Coordinating Committee. The content of this Standard Practice is the resulting efforts of competent and experienced volunteers to provide an effective, c
3、lear, 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 of an MSS Standard Practice does not in itself pre
4、clude 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, as applicable. MSS has no power, nor does it unde
5、rtake, 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 of the statement. “Unless indicated otherwise wit
6、hin this MSS Standard Practice, other standards documents referenced 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 A). This Standard Practice shall remain silent on the validity of those ot
7、her 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 connection therewith. MSS shall not be held re
8、sponsible 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, figures, and references are construed to be essenti
9、al 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 not include mandatory requirements. U.S. customa
10、ry units in this Standard Practice are the standard; (SI) metric units are for reference only. This Standard Practice has been substantially revised from the previous 2001 edition. It is suggested that if the user is interested in knowing what changes have been made, that direct page by page compari
11、son should be made of this document and that of the previous edition. Non-toleranced dimensions in this Standard Practice are nominal and, unless otherwise specified, shall be considered “for reference only”. Excerpts of this Standard Practice may be quoted with permission. Credit lines should read
12、Extracted from MSS SP-124-2012 with permission of the publisher, Manufacturers Standardization Society of the Valve and Fittings Industry. Reproduction and/or electronic transmission or dissemination is prohibited under copyright convention unless written permission is granted by the Manufacturers S
13、tandardization Society of the Valve and Fittings Industry Inc. All rights reserved. Originally Approved: August 1999 Originally Published: December 1999 Current Edition Approved: September 2011 Current Edition Published: May 2012 MSS is a registered trademark of Manufacturers Standardization Society
14、 of the Valve and Fittings Industry, Inc. Copyright 2012 by Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-124 ii TABLE OF CONTENTS SECTION PAGE PURPOSE 1 1 SCOPE . 1 2 DEFINITIONS 1 3 PRESSURE RATING . 1 4 MATERIAL 1 5 DESIG
15、N 2 6 TESTING 3 7 WORKMANSHIP . 3 8 PAINTING, COATING, AND CLEANING 3 9 MARKING AND SHIPPING . 3 10 INSTALLATION 3 ANNEX A Referenced Standards and Applicable Dates . 4 MSS STANDARD PRACTICE SP-124 1 PURPOSE To provide information for standardization of fabricated tapping sleeves, typically used wit
16、h tapping valves to make connections to existing mains without interruption of service. 1. SCOPE 1.1 This Standard Practice covers the performance, design, and installation requirements of tapping sleeves used in water and sewage systems. 1.2 This Standard Practice covers tapping sleeves NPS 4 throu
17、gh NPS 24 (DN 100 through DN 600) that have flanged outlet branch connections with NPS 2 through NPS 12 (DN 50 through DN 300). 2. DEFINITIONS 2.1 Main A pipe used in a water or sewer system for distribution of water or collection of sewage. 2.2 NPS Indicates “Nominal Pipe Size” (U.S customary). A s
18、tandard size identification number is not necessarily an actual dimension. The (SI) metric-based equivalent is termed DN or Nominal Diameter (“diametre nominel“). Guidelines for (SI) metric data may be found in MSS SP-86. 2.3 Purchaser The party entering into a contract or agreement to purchase prod
19、ucts manufactured according to this Standard Practice. 2.4 Manufacturer The party producing products in accordance with this Standard Practice. 2.5 Tapping Machine A machine (also known as a drilling machine) used to cut a hole into an existing pressurized or non-pressurized main through the use of
20、a tapping sleeve and tapping valve. The tapping machine is equipped with a cutter that extends through the waterway of the tapping valve and sleeve branch to cut the hole into the main and remove the cut-out piece (coupon) upon retraction of the cutter. The tapping valve can then be closed to seal t
21、he branch connection while the tapping machine is removed from the valve and the branch pipeline is connected to the tapping valve. 2.6 Tapping Sleeve A fitting that can be assembled onto an existing main to make a branch or “tee” connection to the main with a tapping valve and tapping machine, with
22、out interruption of service. 2.7 Tapping Valve A special gate valve designed with end connections to provide a waterway opening clearance for tapping operations, as well as, proper alignment and positioning of a tapping sleeve, valve, and tapping machine. 2.8 Working Pressure Rating Maximum pressure
23、 to which the in-service tapping sleeve should be subjected. 2.9 Other Definitions Other Definitions may be found in MSS SP-96. 3. PRESSURE RATING 3.1 The minimum working pressure rating shall be 150 psig (10.2 bar) for NPS 4 through NPS 24 (DN 100 through DN 600). 4. MATERIAL 4.1 General The requir
24、ements of ASTM, AWWA, ASME, or other standards to which reference is made in this Standard Practice shall govern the mechanical and chemical characteristics of the tapping sleeve components. FABRICATED TAPPING SLEEVES MSS STANDARD PRACTICE SP-124 2 4.2 Carbon Steel Sheet, plate or strip shall meet o
25、r exceed the requirements of ASTM A283/A283M or equivalent. 4.3 Stainless Steel Sheet, plate, or strip shall meet or exceed the requirements of ASTM A240/A240M and be Type 304 or 304L. Cast materials shall meet or exceed the requirements of ASTM A35l/351M and be Grade CF8/CF8M. 4.4 Ductile Iron Cast
26、ings shall meet or exceed the requirements of ASTM A536 Grade 65-45-12 or ASTM A395/A395M. 4.5 Flanges The purchaser may specify flange materials of steel, stainless steel, or ductile iron as agreed to by the manufacturer. 4.6 Bolting The bolt, stud, and nut materials shall meet or exceed the requir
27、ements of the standards specified. 4.6.1 Steel ASTM A307 or ISO 898-1 with no coating. 4.6.2 Zinc Coated Steel ASTM A307 with coating per A153/A153M or ASTM B633. 4.6.3 Steel Fasteners per Ductile Iron Pressure Pipe and Fittings AWWA C111/A21.11. 4.6.4 Stainless Steel ASTM F593, F594, F738M or F836M
28、, with coating allowed to prevent galling. 4.7 Elastomers Elastomers shall be compounded to meet ASTM D2000 and have physical properties suitable for the application. 4.8 Coatings See Section 8 of this Standard Practice. 5. DESIGN 5.1 General 5.1.1 Installation Tapping sleeves shall be designed to p
29、ermit assembly on an existing main, without interruption of service. Each tapping sleeve shall have a branch connection whose port is perpendicular to, and centered on, the axis of the main. The branch connection provides an attachment point for a tapping valve to allow tapping into the main. 5.1.2
30、Welding All welds shall conform to American Welding Society (AWS) codes or other qualified procedures. 5.2 Main Types and Main Diameters Tapping sleeves may be designed for use on various types and classes of pipe including ductile iron, gray iron (static and centrifugally cast), asbestos cement, PV
31、C, and steel. These different classes and types of pipe may have widely varying outside diameters for each nominal pipe size. 5.3 Tapping Sleeve Sizes The manufacturer should identify the range of pipe diameters for each size and type of tapping sleeve that they produce. 5.4 Tapping Sleeve and Sleev
32、e-to-Main Sealing 5.4.1 Sealing Provisions shall be made for a watertight seal, at working pressure rating, between the pressure containing tapping sleeve mating parts, and between the tapping sleeve assembly and the main. 5.4.2 Hydrostatic Testing Where design of the tapping sleeve permits, a test
33、connection and plug with NPT threads shall be provided so that the purchaser may hydrostatically pressure test the water tightness of the sleeve assembly on the main, the sleeve-to-valve connection at the branch connection flange, and the tapping valve gate before tapping into the main. WARNING! For
34、 personal safety reasons, DO NOT use a compressible fluid, such as compressed air, to check for sealing tightness. MSS STANDARD PRACTICE SP-124 3 5.5 Branch Connection Compatibility The connecting flange of the branch connection must be compatible with tapping valves per MSS SP-60 for sizes NPS 2 th
35、rough NPS 12 (DN 50 through DN 300). Flange drilling shall conform to ASME B16.1 Class 125 drilling or as agreed to by the purchaser and manufacturer. The purchaser must verify compatibility of tapping valve and tapping sleeve. 6. TESTING 6.1 Proof-of-Design Test At least one production prototype of
36、 the minimum and maximum main size for which the sleeve was designed, with the largest outlet connection of each type of tapping sleeve, shall be hydrostatically tested by the manufacturer to a minimum of one and a half (1.5) times the working pressure rating when assembled on a test section of pipe
37、 or an approved test apparatus. 7. WORKMANSHIP 7.1 All parts shall conform to their required dimensions and shall be free from defects that could prevent proper functioning of the tapping sleeve. 8. PAINTING, COATING, AND CLEANING 8.1 Standard Unless otherwise specified by the purchaser, all tapping
38、 sleeves shall receive an interior and exterior coating or treatment to inhibit corrosion during transit. 8.2 Optional 8.2.1 Coatings The purchaser may specify certain other optional coatings conforming to AWWA C210, AWWA C213, AWWA C550, or other coatings agreed to by the manufacturer. 8.2.2 Cleani
39、ng The purchaser may specify that stainless steel tapping sleeves shall be cleaned. When specified, they shall be cleaned according to Sections 5.2 or 5.3 of ASTM A380. 9. MARKING AND SHIPPING 9.1 Marking Markings shall either be stamped, inked, painted, or otherwise marked. In each case, the markin
40、g shall show the manufacturers name or mark, the year of manufacture, the size of the sleeve, the size of the branch connection, and the working pressure rating. 9.2 Shipment Preparation The manufacturer shall use reasonable care in preparing tapping sleeves for shipment. 10. INSTALLATION 10.1 Gener
41、al The manufacturers instructions shall be followed for installing the tapping sleeve on the main. 10.2 Sleeve Selection The sleeve shall be checked to make certain it is recommended for the actual outside diameter (O.D.) size and material type of the main. Also, the main shall be checked for out-of
42、-roundness. 10.3 Main External Surface The external surface of the main shall be cleaned, then checked for any surface defects that could impair the successful installation of the tapping sleeve onto the main. The manufacturers recommendation shall be followed. 10.4 Lubricant The gasket surfaces sha
43、ll be lubricated with suitable lubricant per manufacturers instructions. 10.5 Support The manufacturers instructions shall be followed for proper support of tapping sleeve, valve, and tapping machine. 10.6 Pressure Testing All tapping sleeves shall be hydrostatically pressure tested after installati
44、on on the main per the manufacturers instructions. Any defects or leaks shall be corrected prior to tapping the main. WARNING! For personal safety reasons, DO NOT use a compressible fluid, such as compressed air, to check for sealing tightness. MSS STANDARD PRACTICE SP-124 4 ANNEX A Referenced Stand
45、ards and Applicable Dates This Annex is an integral part of this Standard Practice which is placed after the main text for convenience. Standard Name Description ASME, ANSI/ASME B16.1-2010 Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250 ASTM Standard Specification, Standard Pra
46、ctice and/or Standard Classification System for: A153/A153M-09 Zinc Coating (Hot-Dip) on Iron and Steel Hardware A240/A240M-11b Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications A283/A283M-03(2007) Low and Intermediate Tensile Stre
47、ngth Carbon Steel Plates A307-10 Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength A351/A351M-10 Castings, Austenitic, for Pressure-Containing Parts A380-06 Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems A395/A395M-99(2009) Ferriti
48、c Ductile Iron Pressure-Retaining Castings for Use at Elevated Temperatures A536-84(2009) Ductile Iron Castings B633-11 Electrodeposited Coating of Zinc on Iron and Steel D2000-12 Rubber Products in Automotive Applications F593-02(2008)e1 Stainless Steel Bolts, Hex Cap Screws, and Studs F594-09e1 St
49、ainless Steel Nuts F738M-02(2008) Stainless Steel Metric Bolts, Screws, and Studs F836M-02(2010) Style 1 Stainless Steel Metric Nuts AWWA; ANSI/AWWA C111/A21.11-07 Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings C210-07 Liquid-Epoxy Coating Systems for the Interior and Exterior of Steel Water Pipelines C213-07 Fusion-Bonded Epoxy Coating for the Interior and Exterior of Steel Water Pipelines C550-05 Protective Epoxy Interior Coatings for Valves and Hydrants ISO ISO898-1:2009 Mechanical properties of fasteners made of carbon steel and alloy steel - Part 1
