Section 15085 PIPING CONNECTIONS

Section 15085

PIPING CONNECTIONS

PART 1 - GENERAL

1.1 THE REQUIREMENT

A. This Section specifies the following methods of connecting metallic piping: flanges, threading, mechanical couplings, dielectric unions, and welding.

1.2 REFERENCES

A. This Section contains references to the following documents. They are a part of this Section as specified and modified. In case of conflict between the requirements of this Section and the listed documents, the requirements of this Section shall prevail.

ANSI Bl.1 Unified Inch Screw Threads (UN and UNR Thread Form) ANSI Bl.20.1 Pipe Threads, General Purpose (Inch)

ANSI B16.1 Cast Iron Pipe Flanges and Flanged Fittings

ANSI B16.5 Pipe Flanges and Flanged Fittings

ANSI B18.2.1 Square and Hex Bolts and Screws Inch Series

ANSI B18.2.2 Square and Hex Nuts (Inch Series) ANSI B31.1 Power Piping

ANSI B31.3 Chemical Plant and Petroleum Refinery Piping

ASME Section IX Boiler and Pressure Vessel Code; Welding and Brazing Procedures, Welders, Brazers, and Welding and Brazing Operators Qualifications

ASTM F37 Standard Test Methods for Sealability of Gasket Materials

ASTM F104 Standard Classification System for Nonmetallic Gasket Materials

ASTM F152 Standard Test Methods for Tension Testing of Nonmetallic

Gasket Materials

ASTM F593 Stainless Steel Bolts, Hex Cap Screws, and Studs

ASTM F594 Stainless Steel Nuts

AWWA C111 Rubber-Gasket Joints for Ductile-Iron Pressure Pipe and Fittings

AWWA C206 Field Welding of Steel Water Pipe

AWWA C207 Steel Pipe Flanges for Waterworks Service-Size 4 in. through

144 in.

AWWA C606 Grooved and Shouldered Joints

AWWA Mll Steel Pipe-A Guide for Design and Installation

PART 2 - PRODUCTS

2.1 FLANGE ASSEMBLIES

A. Flanges: Cast iron flanges shall be faced in accordance with ANSI B16.1. Where companion flanges are used, the flanges on pipe shall be refaced to be flush with the companion flange face. Class 150 and Class 300 forged steel flanges shall be raised face conforming to ANSI B16.5. Lightweight slip-on flanges shall be plain face conforming to AWWA C207, Class B and ANSI B16.5. Unless otherwise specified, steel flanges shall be ANSI B16.5, Class 150 or AWWA C207, Class D. Class E AWWA flanges shall be provided where test pressure exceeds 175 psi. Plain faced flanges shall not be bolted to raised face flanges.

B. Gaskets

1. Gasket material shall be as specified in Paragraph 15085-2.3.

2. Gaskets for plain-faced flanges shall be the full-face type. Thickness shall be 1/16 inch for pipe 10 inches and less in diameter and 1/8 inch for pipe 12 inches and larger in diameter. Unless otherwise specified, gaskets for raised face flanges shall match the raised face and shall be 1/16 inch thick for pipe 3-1/2 inches and less in diameter and 1/8 inch thick for pipe 4 inches and larger.

C. Bolts

1. Flange assembly bolts shall be ANSI B18.2.1 standard square or hexagon head bolts with ANSI B18.2.2 standard hexagon nuts. Threads shall be ANSI Bl.1, standard coarse thread series; bolts shall be Class 2A, nuts shall be Class 2B. Bolt length shall conform to ANSI B16.5.

2. Unless otherwise specified, bolts, nuts, and washers shall be hot dipped galvanized carbon steel in conformance with ASTM A307B. Bolts, nuts, and washers for submerged and buried service shall be Type 316 stainless steel and meet the requirement of ASTM A193.

2.2 MECHANICAL COUPLINGS

A. Sleeve-Type Couplings

1. Unless otherwise specified, sleeve-type mechanical pipe couplings shall be Smith- Blair Style 411, Dresser Style 38, or equal, with the stop removed from the middle ring. Reducing couplings shall be Smith-Blair Style 415, Dresser Style 62, or equal. Sleeve-type flanged coupling adapters shall be Smith-Blair Style 913, Dresser Style

128, or equal. Insulating couplings shall be Smith-Blair Style 416, Dresser Style 39, or equal.

2. Bolts and nuts for submerged service shall be made of Type 316 stainless steel in conformance with ASTM F593F and ASTM F594F. Bolts and nuts for buried service shall be made of noncorrosive high-strength, low-alloy steel having the characteristics specified in ANSI/AWWA C111/A21, regardless of any other protective coating.

3. Gaskets shall be as specified in Paragraph 15085-2.3 and AWWA C111. B. Plain End Couplings

1. Plain end pipe couplings for pipe sizes 6 inches and smaller shall be Anvil Gruvlok

7005, Victaulic Style 99, or equal for Schedule 80 pipe and Anvil Gruvlok 7005, Victaulic Style 90, or equal for lighter weight pipe. Plain end couplings for pipe sizes

8 inches and larger shall be Anvil Gruvlok 7005, Victaulic Style 99, or equal. Unless otherwise specified, bolts and nuts shall comply with AWWA C606.

2. Gaskets shall be as specified in Paragraph 15085-2.3 and AWWA C606.

C. Grooved End Couplings

1. Grooved end flexible-type couplings shall be Anvil Gruvlok 7001, Victaulic Style 77, or equal. Grooved end rigid-type couplings shall be Anvil Gruvlok 7401, Victaulic Style 07 Zero-Flex, or equal. Flexible-type couplings shall be used for all piping greater than 12 inches in diameter; for pipe 12 inches in diameter and less in rack- mounted tunnel piping applications; and for grooved joints adjacent to pump or blower suction and discharge where grooved couplings are used for noise and vibration control. All other applications for piping 12 inches in diameter and less shall utilize rigid-type couplings. Grooved end flanged coupling adapters shall be either Anvil Gruvlok 7012, Victaulic Style 741, or equal. Snap-joint grooved end couplings shall be Anvil Gruvlok 7003, Victaulic Style 78, or equal. Cut grooves are not permitted on fabricated or light wall pipe.

2. Unless otherwise specified, bolts and nuts shall comply with AWWA C606. Bolts and nuts for submerged service shall be Type 316 stainless steel in conformance with ASTM F593F and ASTM F594F. Bolts and nuts for buried service shall be made of noncorrosive high-strength, low-alloy steel having the characteristics specified in ANSI/AWWA C111/A21, regardless of any other protective coating.

3. Gaskets shall be as specified in Paragraph 15085-2.3 and AWWA C 606.

2.3 GASKETS

A. Gaskets designated in Section 15050 shall be as follows:

1. EPDM: Ethylene-propylene-diene-terpolymer.

2. Neoprene: Neoprene.

3. Nitrile: Nitrile (Buna N).

4. Compressed gasketing consisting of organic fibers (Kevlar) and neoprene binder; ASTM F104 (F712400), 2500 psi (ASTM F152), 0.2 ML/HR LEAKAGE FUEL A (ASTM F37).

5. Compressed gasketing consisting of organic fibers (Kevlar) and SBR binder; ASTM F104 (F712400), 2500 PSI (ASTM F152), 0.1 ml/hr leakage Fuel A (ASTM F37).

6. Gylon gasketing, Garlock Style 3500, 2000 psi (ASTM F152), 0.22 ml/hr Fuel A (ASTM F37).

7. Gylon gasketing, Garlock Style 3510, 2000 psi (ASTM F152), 0.04 ml/hr Fuel A (ASTM F37).

8. Gylon gasketing, Garlock Style 3504, 2000 psi (ASTM F152), 0.12 ml/hr Fuel A (ASTM F37).

9. TFE: Noncreeping tetrafluoroethylene (TFE) with insert filler.

10. TFE Bonded EPDM: TFE bonded to EPDM in full-face gasket having concentric- convex molded rings.

2.4 THREAD

A. Pipe thread dimensions and size limits shall conform to ANSI Bl.20.1.

2.5 DIELECTRIC UNIONS

A. Dielectric unions shall be EPCO, Capital, or equal.

2.6 COATINGS

A. Unless otherwise specified, flange assemblies and mechanical type couplings for buried installation shall be field coated as specified in Section 09800.

2.7 PRODUCT DATA

A. In accordance with Section 01300, the Contractor shall provide for each welder, a welder qualification certificate indicating the welder is certified for pipe welding in accordance with ASME Boiler and Pressure Vessel, Section IX. Each welder's certificate shall be provided to the Resident Project Representative prior to that welder working on the job.

PART 3 - EXECUTION

3.1 PIPE CUTTING, THREADING AND JOINTING

A. Pipe cutting, threading and jointing shall conform to the requirements of ANSI B31.1.

3.2 PIPE WELDING

A. Pipe shall be welded by ASME-certified welders using shielded metal arc, gas shielded arc or submerged arc welding methods. Welds shall be made in accordance with the requirements of ANSI B31.1 for piping Systems 8, 26, and 28 specified in Section 15050. Welds shall be made in accordance with the requirements of ANSI B31.3 for piping System

20 specified in Section 15050.

B. Welds for piping systems not specified above shall be made in accordance with AWWA C206.

3.3 TAKEDOWN COUPLINGS

A. Takedown couplings shall be screw unions, flanged or grooved end mechanical coupling type joints and shall be provided as specified. Flanged or grooved end joints shall be employed on pipelines 2-1/2 inches in diameter and larger. Where piping passes through walls, takedown couplings shall be provided within 3 feet of the wall, unless specified otherwise.

B. A union or flanged connection shall be provided within 2 feet of each threaded end valve.

3.4 FLEXIBILITY

A. Unless otherwise specified, piping 2 inches in diameter and larger passing from concrete to earth shall be provided with two pipe couplings or flexible joints as specified within 2 feet or one pipe diameter of the structure, whichever is greater. Where required for resistance to pressure, mechanical couplings shall be restrained in accordance with AWWA M11, Paragraph 13.10, Tables 13-6 and 13-7, and Figure 13-17.

3.5 DIELECTRIC CONNECTIONS

A. Where a copper pipe is connected to steel or cast iron pipe, an insulating section of rubber or plastic pipe shall be provided. The insulating section shall have a minimum length of 12 pipe diameters. Dielectric unions as specified in Paragraph 15085-2.5 may be used instead of the specified insulating sections. Where copper pipe is supported from hangers, it shall be insulated from the hangers, or copper-plated hangers shall be used.

END OF SECTION