1、MSS SP-124-2016 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: standardsmsshq.org www.msshq.org
2、 MSS STANDARD PRACTICE SP-124i 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, clear, an
3、d 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 preclude th
4、e 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 undertake, t
5、o 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 within this
6、 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 other stan
7、dards 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 responsibl
8、e 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 essential to th
9、e 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. customary units
10、 in this Standard Practice are the standard; SI (metric) units are for reference only. Substantive changes in this 2016 edition are flagged by parallel bars as shown on the margins of this paragraph. The specific detail of these changes may be determined by comparing the material flagged with that i
11、n the previous edition. Non-toleranced dimensions in this 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-124-2016 with permission of the publisher, Manufacturers Standardizatio
12、n 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 Standardization Society of the Valve and Fittings Industry Inc. All rights reserved. Originall
13、y Approved: August 1999 Originally Published: December 1999 Current Edition Approved: October 2016 Current Edition Published: November 2016 MSS is a registered trademark of Manufacturers Standardization Society of the Valve and Fittings Industry, Inc. Copyright , 2016 by Manufacturers Standardizatio
14、n Society of the Valve and Fittings Industry, Inc. Printed in U.S.A. MSS STANDARD PRACTICE SP-124ii TABLE OF CONTENTS SECTION PAGE PURPOSE . 1 1 SCOPE 1 2 DEFINITIONS 1 3 PRESSURE RATING . 2 4 MATERIAL 2 5 DESIGN 2 6 TESTING 3 7 WORKMANSHIP . 3 8 PAINTING, COATING, AND CLEANING 3 9 MARKING AND SHIPP
15、ING . 4 10 INSTALLATION 4 ANNEX A Referenced Standards and Applicable Dates 5 MSS STANDARD PRACTICE SP-1241 FABRICATED TAPPING SLEEVES PURPOSE To provide information for standardization of fabricated tapping sleeves, typically used with tapping valves to make connections to existing mains without in
16、terruption of service. 1. SCOPE 1.1 This Standard Practice covers the performance, design, and installation requirements of fabricated tapping sleeves used in water and sewage systems. 1.2 This Standard Practice covers tapping sleeves NPS 4 through NPS 24 (DN 100 through DN 600) that have flanged ou
17、tlet 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 sewerage system for distribution of water or collection of sewage. 2.2 Manufacturer The party producing products in accordance with this Standard Practice. 2.3 NPS Indicates “N
18、ominal Pipe Size” (based on U.S. customary units). An NPS number is a standard size identification number that is not necessarily an actual dimension. The European or international designation equivalent to NPS is called DN (nominal diameter/diamtre nominal) in which sizes are based on SI (metric) u
19、nits. Guidelines for SI (metric) data may be found in MSS SP-86. 2.4 Purchaser The party entering into a contract or agreement to purchase products manufactured according to this Standard Practice. 2.5 Tapping Machine A machine (also known as a drilling machine) used to cut a hole into an existing p
20、ressurized or non-pressurized main through the use of a tapping sleeve and a 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 th
21、e cutter. The tapping valve can then be closed to seal the 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
22、 the main with a tapping valve and tapping machine, and without interruption of service. 2.7 Tapping Valve A gate valve with special end connections that are designed to provide proper alignment of a tapping sleeve, the tapping valve, and a tapping machine, so that the tapping machine cutter will pa
23、ss through the tapping valve and tapping sleeve branch with clearance during the tapping operation. A tapping valve is also specially designed so that its gate opens sufficiently to provide clearance for the tapping cutter to pass through the open valve during the tapping operation, and so that ther
24、e is sufficient distance between the gate and the valves connection with the tapping machine to provide clearance between the gate and the pilot drill and cutter at the conclusion of the tapping operation, when the cutter is withdrawn and the tapping valve is closed. 2.8 Working Pressure Rating Maxi
25、mum pressure to which the in-service tapping sleeve should be subjected. 2.9 Other Definitions Other Definitions may be found in MSS SP-96. MSS STANDARD PRACTICE SP-1242 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 D
26、N 600). 4. MATERIAL 4.1 General The requirements 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. 4.2 Carbon Steel Sheet, plate or strip shall meet or exceed the req
27、uirements 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 A351/A351M and be Grade CF8/CF3. 4.4 Ductile Iron Castings shall meet
28、or exceed the requirements of ASTM A536 or ASTM A395/A395M, with the additional requirement that the minimum allowable elongation of the ductile iron shall be five percent (5%). 4.5 Flanges The purchaser may specify flange materials of steel, stainless steel, or ductile iron as agreed to by the manu
29、facturer. 4.6 Bolting The bolt, stud, and nut materials shall meet or exceed the requirements of the standards specified. 4.6.1 Steel As per ASTM A307 or ISO 898-1 with no coating. 4.6.2 Zinc Coated Steel As per ASTM A307, with coating per ASTM A153/A153M or ASTM B633. 4.6.3 Steel Fasteners per Duct
30、ile Iron Pressure Pipe and Fittings As per AWWA C111. 4.6.4 Stainless Steel ASTM F593, ASTM F594, ASTM F836M, or ISO 3506-1, with coating allowed to prevent galling. 4.7 Elastomers The elastomer material shall be compounded to meet ASTM D2000 and have physical properties suitable for the application
31、. 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 permit assembly on an existing main, without interruption of service. Each tapping sleeve shall have a branch connection whose port is perpendicular to, and centered
32、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 Welding All welds shall conform to American Welding Society (AWS) codes or other qualified procedures. MSS STANDARD PRACTICE SP-1243 5.2 Main Types and Main Diameter
33、s 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 (e.g., fibrous/fibro cement), PE, PVC, and steel. These different classes and types of pipe may have widely varying outside diameters for
34、 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 Sleeve-to-Main Sealing 5.4.1 Sealing Provisions shall be made for a watertight seal, at working pressure r
35、ating, 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 connection and plug with NPT threads shall be provided so that the purchaser may hydrostatically pres
36、sure 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 personal safety reasons, DO NOT use a compressible fluid, such as compressed air, to check for seali
37、ng tightness. 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 through NPS 12 (DN 50 through DN 300). Flange drilling shall conform to ASME B16.1, Class 125 drilling or as agreed to by the purchase
38、r and manufacturer. The purchaser must verify the compatibility of tapping valve and the tapping sleeve. 6. TESTING 6.1 Proof-of-Design Test At least one production prototype of the minimum and maximum main size for which the sleeve was designed, with the largest outlet connection of each type of ta
39、pping 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 or an approved test apparatus. 7. WORKMANSHIP 7.1 All parts shall conform to their required dimensions and shall be free f
40、rom 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 sleeves shall receive an interior and exterior coating or treatment to inhibit corrosion during transit. 8.2 Optional 8.2.
41、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 Cleaning The purchaser may specify that stainless steel tapping sleeves shall be cleaned. When specified, they shall be cleaned a
42、ccording to Sections 5.2 or 5.3 of ASTM A380/A380M. 9. MARKING AND SHIPPING 9.1 Marking The markings shall either be stamped, inked, painted, or otherwise marked. In each case, the marking shall show the manufacturers name or mark, the year of manufacture, the size of the sleeve, the size of the bra
43、nch connection, and the working pressure rating. MSS STANDARD PRACTICE SP-1244 9.2 Shipment Preparation The manufacturer shall use reasonable care in preparing tapping sleeves for shipment. 10. INSTALLATION 10.1 General The manufacturers instructions shall be followed for installing the tapping slee
44、ve 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. In addition, to ensure the sleeve fits properly around the main for a secure seal, the main shall be checked for out-of-round
45、ness. 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 shall be
46、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 installation on
47、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-1245 ANNEX A Referenced Standards an
48、d Applicable Dates This Annex is an integral part of this Standard Practice and is placed after the main text for convenience. Standard Name Description ASME, ANSI/ASME B16.1-2015 Gray Iron Pipe Flanges and Flanged Fittings: Classes 25, 125, and 250 ASTM Standard Specification, Standard Practice and
49、/or Standard Classification System for: A153/A153M-16 Zinc Coating (Hot-Dip) on Iron and Steel Hardware A240/A240M-16 Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications A283/A283M-13 Low and Intermediate Tensile Strength Carbon Steel Plates A307-14 Carbon Steel Bolts, Studs, and Threaded Rod 60000 PSI Tensile Strength A351/A351M-16 Castings, Austenitic, for Pressure-Containing Parts A380/A380M-13 Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems A3
