EXPANSION FITTINGS AND LOOPS FOR PLUMBING PIPING
PART 1 - GENERAL
1.01
Drawings and general provisions of the Contract, including the General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section.
This Section includes pipe expansion joints, guides, and anchors for mechanical piping systems.
Compatibility: Prov ide pipe expansion joints, pipe alignment guides, and pipe anchors suitable for piping system fluids, materials, working pressures, and temperatures.
Fabricate and install expansion and anchor system capable of sustaining forces generated by gravity, thermal movement, and seismic events
General: Submit the following according to the Conditions of the Contract and Division 1 Specification Sections.
Product data for each type of pipe expansion joint and pipe alignment guide specified.
Pipe expansion joint schedule showing manufacturer's figure number, size, location, and features for each required expansion joint.
Assembly-type shop drawings for each type of pipe expansion joint, pipe alignment guide, and anchor, indicating dimensions, weights, required clearances, and methods of component assembly.
Welder certificates signed by Contractor certifying that welders comply with requirements specified under the "Quality Assurance" Article.
Maintenance data for each type pipe expansion joint specified to include in the "Operating and Maintenance Manuals" specified in the Division 1 Section "Project Closeout".
Qualify welding processes and welding operators according to AWS D1.1 "Structural Welding Code--Steel".
Certify that each welder has satisfactorily passed AWS qualification tests for welding processes involved and, if pertinent, has undergone recertification.
Qualify welding processes and welding operators according to ASME "Boiler and Pressure Vessel Code", Section IX, "Welding and Brazing Qualifications".
PART 2 - PRODUCTS
2.01
Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated in the Work include but are not limited to the following:
Metal-Bellows, Packless-Type Pipe Expansion Joints: a.
EXPANSION FITTINGS AND LOOPS FOR PLUMBING PIPING
Senior Flexonics Inc., Expansion Joint Div.
Expansion-Compensator, Packless-Type Pipe Expansion Joints: a.
Senior Flexonics Inc., Expansion Joint Div.
Rubber-Sphere, Packless-Type Pipe Expansion Joints: a.
Garlock Mechanical Packing Div., Colt Industries.
Senior Flexonics Inc., Expansion Joint Div.
Vibration Mountings & Controls, Inc.
Capability: Absorb 200 percent of maximum piping expansion between anchors.
Refer to "Pipe Expansion Joint Schedule" for criteria of individual pipe expansion joints.
Pipe expansion joint pressure ratings shall be compatuble with piping system where system pressures require PN 16 or PN 32 components. This applies to all the following joint types.
Metal-Bellows Packless-Type Pipe Expansion Joints: Pressure rated for 1200 kPa minimum; conform to the standards of Expansion Joint Manufacturers Association, Inc. (EJMA); with end fittings and external tie rods for limiting maximum travel. Features include the following:
Copper Piping Systems: 2 ply phosphor-bronze bellows and brass shrouds.
Steel Piping Systems: 2 ply stainless-steel bellows and carbon-steel shrouds.
Expansion-Compensator Packless-Type Pipe Expansion Joints: Pressure rated for 1600 kPa minimum for low-pressure systems and for 3200 kPa minimum for high-pressure systems. Include 2 ply phosphor bronze bellows, brass shrouds, and end fittings for copper piping systems
EXPANSION FITTINGS AND LOOPS FOR PLUMBING PIPING
and 2 ply stainless-steel bellows, carbon-steel shrouds, and end fittings for steel piping systems. Include internal guides, antitorque device, and removable end clip for proper positioning.
Rubber-Sphere Packless-Type Pipe Expansion Joints: Single-sphere type, fabric-reinforced butyl rubber with full-faced integral flanges, external control rods, and internal reinforcing. Include steel retaining rings drilled to match flange bolt holes over entire surface of flanges. Pressure rating is 1200 kPa minimum at 116 deg C minimum.
Rubber-Sphere Packless-Type Pipe Expansion Joints: Double-sphere type, fabric-reinforced butyl rubber with full-faced integral flanges, external control rods, and internal reinforcing. Include steel retaining rings drilled to match flange bolt holes ov er entire surface of flanges. Pressure rating is 1200 kPa minimum at 116 deg C minimum.
Carbon-steel packing-type expansion joint designed for repacking under pressure. Include limit stops, flanged or weld ends to match piping system, and drip connection where used for steam piping systems.
Joint Packing: Asbestos-free polytetrafluoroethylene (PTFE) compound.
Pressure Rating: 1725 kPa minimum at 204 deg C minimum.
General: Designed for 360 degree (6.3rad) rotation and minimum of 30 degree (0.52rad) angular deflection for sizes 150 mm and smaller and 15 degree (0.26rad) for sizes 200 mm and larger.
Carbon steel and comply with ASME "Boiler and Pressure Vessel Code", Section II "Materials Specifications" and ASME B31.9 "Building Services Piping" for materials and design of pressure containing parts and bolting.
Pressure Rating: 1725 kPa minimum at 204 deg C minimum.
Factory Test: Test before shipment with steam at working pressure of piping system with no leaks.
Factory-fabricated cast semisteel or heavy fabricated steel, consisting of bolted two-section outer cylinder and base. Include two-section guiding spider that bolts tightly to the pipe.
Alignment Guide Lengths: As required for indicated travel.
Structural Steel: ASTM A 36/A 36M, steel plates, shapes, and bars, black and galvanized.
Bolts and Nuts: ASME B18.10 or ASTM A 183, steel, hex-head, traand nuts.
Washers: ASTM F 844, steel, plain, flat washers.
Power-Actuated Fasteners: Attachments with pull-out and shear capacities appropriate for supported loads and building materials where used.
Concrete: Portland-cement mix, (20.7 MPa).
Coarse Aggregate: ASTM C 33, crushed gravel.
EXPANSION FITTINGS AND LOOPS FOR PLUMBING PIPING
Grout: ASTM C 1107, Grade B, nonshrink, nonmetallic.
Characteristics include post-hardening volume-adjusting dry hydraulic-cement-type grout that is nonstaining, noncorrosive, nongaseous and is recommended for both interior and exterior applications.
Design Mix: (34.5 MPa), 28 day compressive strength.
Packaging: Premixed and factory-packaged.
PART 3 - EXECUTION
3.01
Examine substrates and conditions under which pipe expansion joints, pipe alignment guides, and pipe anchors are to be installed. Do not proceed until unsatisfactory conditions have been corrected.
Install pipe expansion joints according to manufacturer's written instructions.
Align expansion joints to avoid end-loading and torsional stress.
Use rubber sphere packless type expansion joints for pipes up to 200 mm and metal-bellows packless type for pipes above 200 mm.
FABRICATED-TYPE PIPE EXPANSION COMPENSATION INSTALLATION
Install pipe expansion loops cold-sprung in tension or compression as required to absorb 50 percent of total compression or tension that will be produced during anticipated change in temperature.
Connect risers to mains with at least 5 pipe fittings including tee in main.
Connect risers to terminal units with at least 4 pipe fittings including tee in riser.
Install pipe alignment guides on piping that adjoins pipe expansion joints.
Install pipe alignment guides on piping that adjoins pipe expansion loops.
Install pipe alignment guides on piping elsewhere as indicated.
Secure pipe alignment guides to building substrate.
Install pipe anchors at proper locations to prevent stresses from exceeding those permitted by ASME B31.9 and to prevent transfer of loading and stresses to connected equipment.
Fabricate and install anchors by welding steel shapes, plates, and bars to piping and to structure. Comply with ASME B31.9 and with AWS D1.1.
Construct concrete pipe anchors of poured-in-place concrete of dimensions indicated.
Where pipe expansion joints are indicated, install pipe anchors according to expansion unit manufacturer's written instructions to control movement to compensators.
EXPANSION FITTINGS AND LOOPS FOR PLUMBING PIPING
Pipe Anchor Spacings: Where not otherwise indicated, install pipe anchors at ends of principal pipe runs, at intermediate points in pipe runs between expansion loops and bends. Preset anchors as required to accommodate both expansion and contraction of piping.
Use grout to form flat bearing surfaces for pipe expansion joints, pipe alignment guides, and pipe anchors that are installed on or in concrete.
Touching Up: Clean field welds and abraded areas of shop paint and paint, exposed areas immediately after erecting hangers and supports. Use same materials as used for shop painting. Comply with SSPC-PA 1 requirements for touching up field-painted surfaces.
Apply by brush or spray to provide a minimum dry film thickness of 2.0 mils (0.05 mm).
Touching Up: Cleaning and touchup painting of field welds, bolted connections, and abraded areas of shop paint on miscellaneous metal is specified in Division 9 Section "Painting & Coating".
Galvanized Surfaces: Clean welds, bolted connections, and abraded areas and apply galvanizing-repair paint to comply with ASTM A 780.
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