Page 148 - GRINNELL Mechanical Grooved Piping Products EMEA

Grooved Couplings
Pressure and Design Data
Typical Guide Specification
Basic Materials & Methods (CSI - Div. 15 Section 15050)
Section 1 - Materials - Pipe & Pipe Fittings
1.1 Pipe - Pipe shall conform to GRINNELL published tolerance specifications. Steel pipe shall be black or galvanised, conforming to ASTM A-135, A-795 or A-53.
1.2 Couplings - Couplings shall be GRINNELL Figures 705, 707, 772 and 716 cast in ductile iron as specified in ASTM A-536. Couplings shall have nuts and bolts. Couplings shall be coated with a lead free paint as standard, or hot-dipped galvanised in accordance with ASTM A-153 as an option. Couplings shall
be GRINNELL Figures 405 and 472 cast in Stainless Steel as specified in ASTM A-743/A- 743M. Couplings shall have nuts and bolts.
1.2.1 Gaskets - Gaskets shall be a pressure responsive design, moulded of synthetic elastomer as designated by ASTM D-2000, and shall conform to the coupling housing and pipe outside diameter. Reference shall be made to the latest published GRINNELL gasket selection guide for proper gasket selection for the intended service.
1.2.1.1 Water Service - Gasket shall be Grade “E” EPDM with green colour code identification, for service temperatures from - 34°C to 110°C (-30°F to 230°F). Recommended for hot water not to exceed 110°C (230°F), plus a variety of dilute acids, oil free air and many chemical services. Not recommended for petroleum services or steam.
1.2.1.2 Oil Service - Gasket shall be grade “T” Nitrile with orange colour code identification, for service temperatures from -29°C to 82°C (-20°F to 180°F). Recommended for petroleum products, vegetable oils, mineral oils, and air with oil vapours.
1.2.1.3 Other Services - Refer to the latest published GRINNELL gasket selection guide for other service recommendations.
1.2.2 Bolts and Nuts - Shall be heat treated carbon steel, ovalneck track head bolts and heavy hex nuts, conforming to the physical properties of ASTM A-183 with a minimum tensile strength of 7584 Bar (110,000 psi). Bolts and nuts shall be zinc electroplated.
1.3 Flanges - Shall be GRINNELL Figure 71 Flange, casting in ductile iron in accordance with ASTM A-536. Flange shall conform to ANSI Class 125 and 150 bolt patterns and shall be coated with a lead-free paint as standard, or hot dipped galvanised in accordance to ASTM A-153.
1.4 Fittings - Shall be ASTM A-536 ductile iron or fabricated from steel pipe, 32mm
- 600mm (1 1⁄4" - 24"). All fittings shall be coated with a lead-free paint as standard, or hot-dipped galvanised as an option in accordance to ASTM A-153.
1.5 Branch Outlets - Shall be GRINNELL Figure 730 mechanical tees or crosses with integral gasket. Figure 730 shall be coated with a lead-free paint as standard, or hot- dipped galvanised as an option.
1.6 Butterfly Valves - Shall be with grooved ends. Valves shall have encapsulated Grade “E” EPDM or Grade “T” Nitrile disc and rated at 20.7 Bar (300 psi) bubble-tight-shut-off. Reference shall be ma1100de to the latest published GRINNELL gasket selection guide for proper disc seal selection for the intended service. Valve bodies shall be ductile iron, and upper stems shall be stainless steel.
1.7 Check Valves - Shall be with grooved ends. Valves shall have a resilient elastomer seal Grade “E” EPDM or Grade “T” Nitrile and rated at 20.7 Bar (300 psi). Reference shall be made to the latest published GRINNELL gasket selection guide for proper seal selection for the intended service. Valve bodies shall be ductile iron with a nickel seat. The caps shall be ductile iron with an attached stainless steel clapper assembly for 60.3mm - 219.1mm (2"
- 8") and a ductile iron clapper assembly for 273.0mm - 323.9mm (10" - 12"). All bodies and caps shall be coated with a lead-free paint as standard.
Section 2 - Materials - Pipe Preparation
Pipe shall be prepared according to GRINNELL published specifications, ANSI/AWWA C-606, or other applicable standards.
2.1 Pipe Ends - Shall be clean and free from indentations, projections, burrs, rust or roll marks in the area from pipe end to groove.
2.1.1 Standard Weight Pipe - Shall be
roll grooved without removing metal, or
cut grooved in accordance with GRINNELL published standard roll groove or standard cut groove specifications.
2.1.2 Lightwall Pipe - Shall be roll grooved without metal removal in accordance with GRINNELL published standard roll groove specifications.
Section 3 - Assembly
3.1 GRINNELL couplings, fittings, flanges and valves shall be assembled in accordance with instructions published by GRINNELL Mechanical Products.
3.1.1 Pipe - Ends shall be clean and free from indentations, projections, burrs, roll marks,
etc., in the area from pipe end to groove. Pipe ends shall be square cut and prepared in accordance with standard GRINNELL specifications.
3.1.2 Gasket - Shall be of pressure responsive design verified as proper style and grade suitable for the intended service as published in the latest GRINNELL gasket recommendation technical literature.
3.1.3 Lubrication - A thin, uniform coat of GRINNELL lubricant shall be applied to the entire exterior of the gasket, including the gasket lips. Complete lubrication is essential to prevent gasket pinching and to ease installation and alignment. Petroleum-free silicone gasket lubricant is recommended when gaskets are subject to low temperature conditions. Petroleum lubricants shall not be used for EPDM gaskets.
Section 4 - Support
4.1 Horizontal Piping: ( Contact GRINNELL Mechanical Products for support recommendations)
4.1.1 Flexible Connections - No pipe
length shall be left unsupported between
any two couplings, nor shall any pipe be left unsupported whenever a change in direction of line flow takes place. Supports shall meet the requirements stated above, but in no
case shall the distance between supports exceed the following for systems where linear movement is not required:
4.1.2 Rigid Connections - Pipe connections formed with the Figure 772 shall be supported in accordance with applicable ANSI B31.1, Power Piping Code; ANSI B31.9, Building Service Pipe Code.
11⁄4 - 11⁄2 12 2 - 8 15
10 - 12 16 14 - 16 18 18 - 24 20
Distance Between Supports
Nominal Size mm Inches
Span Metres Feet
42.4 - 48.3
3.7
60.3 - 219.1
4.6
273.0 - 323.9
4.9
355.6 - 406.4
5.5
457.2 - 609.6
6.1
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Note: The requirements of ANSI, ASME or other code groups may require additional supports.