DaimlerChrysler
Construction Standards
12/17/04
SECTION 15121 - PIPE EXPANSION FITTINGS AND LOOPS
PART 1 - GENERAL
1.1
SUMMARY
This Section includes pipe expansion fittings and loops for mechanical piping systems, and the
following:
Metal-bellows expansion joints.
Expansion compensators.
Rubber expansion joints.
Flexible-hose expansion joints.
Slip expansion joints.
Pipe bends and loops.
Guides and anchors.
1.2
PERFORMANCE REQUIREMENTS
Compatibility:
Products suitable for piping system fluids, materials, working pressures, and
temperatures.
Capability: Absorb 200 percent of maximum piping expansion between anchors.
1.3
SUBMITTALS
Product Data: For each type of expansion fitting indicated.
Shop Drawings: Signed and sealed by a qualified professional engineer.
Anchor Details: Detail fabrication of each indicated. Show dimensions and methods of
assembly.
Alignment Guide Details: Detail field assembly and anchorage.
Welding Certificates: Copies of certificates for welding procedures and personnel.
Schedule: Indicate manufacturer's number, size, location, and features for each expansion fitting and
loop.
1.4
QUALITY ASSURANCE
Engineering Responsibility: Design and preparation of Shop Drawings and calculations for expansion
fittings and loops by a qualified professional engineer.
Welding: Qualify processes and operators according to ASME Boiler and Pressure Vessel Code:
Section IX, "Welding and Brazing Qualifications."
PART 2 - PRODUCTS
2.1
MANUFACTURERS
Manufacturers: Unless otherwise directed by the Owner, provide products by one of the following:
Metal-Bellows Expansion Joints:
Adsco Manufacturing Corp.
Anamet, Inc.
Badger Industries, Inc.
Expansion Joint Systems, Inc.
PIPE EXPANSION FITTINGS AND LOOPS
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Flexicraft Industries.
Flex-Weld, Inc.
Hyspan Precision Products, Inc.
Metraflex Co.
Pathway Bellows, Inc.
Piping Technology & Products, Inc.
Proco Products, Inc.
Senior Flexonics, Inc.; Expansion Joint Div.
Wahlco Engineered Products, Inc.
Expansion Compensators:
Adsco Manufacturing Corp.
Flexicraft Industries.
Flex-Weld, Inc.
Hyspan Precision Products, Inc.
Metraflex Co.
Senior Flexonics, Inc.; Expansion Joint Div.
Rubber Expansion Joints:
Flexicraft Industries.
Flex-Weld, Inc.
Garlock, Inc.
General Rubber Corp.
Mercer Rubber Co.
Metraflex Co.
MG Piping Products Co.
Proco Products, Inc.
Senior Flexonics, Inc.; Expansion Joint Div.
Vibration Mountings & Controls, Inc.
Flexible-Hose Expansion Joints:
Flexicraft Industries.
Metraflex Co.
Slip Expansion Joints:
Adsco Manufacturing Corp.
Advanced Thermal Systems, Inc.
Hyspan Precision Products, Inc.
Guides:
Adsco Manufacturing Corp.
Advanced Thermal Systems, Inc.
B-Line Systems, Inc.
Flex-Weld, Inc.
Grinnell Corp.
Hyspan Precision Products, Inc.
Metraflex Co.
2.2
PACKLESS EXPANSION JOINTS
Metal-Bellows Expansion Joints: 175-psigminimum pressure rating, with end fittings and external tie
rods for limiting maximum travel, and flanged-end connections, unless otherwise indicated.
Configuration: Single- and double-bellows type, with base, unless otherwise indicated.
Joints for Copper Piping: Two-ply, phosphor-bronze bellows and brass shrouds.
Joints for Stainless-Steel Waterway: Single-ply stainless-steel bellows, stainless-steel-pipe end
connections, and steel shroud.
Joints for Steel Piping: Two-ply, stainless-steel bellows and carbon-steel shroud.
Expansion Compensators: 175-psig minimum pressure rating, with internal guides, antitorque device,
and removable end clip for positioning.
End Connections for NPS 2 and Smaller: Threaded.
End Connections for NPS 2-1/2 and Larger: Flanged.
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Joints for Copper Piping: Two-ply, phosphor-bronze bellows and brass shroud.
Joints for Steel Piping: Two-ply, stainless-steel bellows and carbon-steel shroud.
Rubber Expansion Joints: ASTM F 1123, fabric-reinforced butyl rubber, and pressure rated for 175
psig at 240 deg Fminimum.
Configuration: Full-faced, integral, steel-flanged-end connections; external control rods; and
steel retaining rings drilled to match flange bolt holes.
Flexible-Hose Expansion Joints: Manufactured assembly with two flexible-metal-hose legs joined by
long-radius 180-degree return bend with inlet and outlet elbow fittings, corrugated-metal inner
hoses, and braided outer sheaths.
Joints for Copper Piping: Copper fittings with solder-joint end connections.
NPS 2 and Smaller: Bronze hoses and double-braid bronze sheaths with 700 psig at 70
deg Fand 500 psig at 450 deg F minimum pressure ratings.
NPS 2-1/2 to NPS 4: Stainless-steel hoses and double-braid, stainless-steel sheaths with
420 psig at 70 deg F and 315 psig at 450 deg F minimum pressure ratings.
Joints for Steel Piping: Carbon-steel fittings.
End Connections for NPS 2 and Smaller: Threaded.
End Connections for NPS 2-1/2 and Larger: Flanged.
Joints for NPS 2 and Smaller: Stainless-steel hoses and single-braid, stainless-steel
sheaths with 450 psig at 70 deg F and 325 psig at 600 deg F minimum pressure
ratings.
Joints for NPS 2-1/2 to NPS 6: Stainless-steel hoses and double-braid, stainless-steel
sheaths with 275 psig at 70 deg F and 200 psig at 600 deg F minimum pressure
ratings.
Joints for NPS 8 and Larger: Stainless-steel hoses and double-braid, stainless-steel
sheaths with 165 psig at 70 deg F and 120 psig at 600 deg F minimum pressure
ratings.
2.3
PACKED EXPANSION JOINTS
Slip Expansion Joints: Carbon-steel, packing-type pipe expansion joint designed for repacking under
pressure and pressure rated for 250 psig at 400 deg F minimum with compound limit stops,
flanged or weld ends to match piping system, drip connection if used for steam piping systems,
and flanged-end connections, unless otherwise indicated.
Packing: Asbestos-free polytetrafluoroethylene.
Double-Slip Type: With base.
2.4
GUIDES
Steel, factory fabricated, with bolted two-section outer cylinder and base for alignment of piping and
two-section guiding spider for bolting to pipe.
2.5
MISCELLANEOUS MATERIALS
Structural Steel: ASTM A 36/A 36M.
Bolts and Nuts: ASME B18.10 or ASTM A 183, steel, hex head.
Washers: ASTM F 844, steel, plain, flat washers.
Mechanical Fasteners: Insert-wedge-type stud with expansion plug anchor for use in hardened
portland cement concrete, and tension and shear capacities appropriate for application.
Stud: Threaded, zinc-coated carbon steel.
Expansion Plug: Zinc-coated steel.
Washer and Nut: Zinc-coated steel.
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Chemical Fasteners: Insert-type-stud bonding system anchor for use with hardened portland cement
concrete, and tension and shear capacities appropriate for application.
Bonding Material: ASTM C 881, Type IV, Grade 3, two-component epoxy resin suitable for
surface temperature of hardened concrete where fastener is to be installed.
Stud: ASTM A 307, zinc-coated carbon steel with continuous thread on stud, unless otherwise
indicated.
Washer and Nut: Zinc-coated steel.
Concrete: Portland cement mix, 3000 psi minimum. Refer to Division 3 Section "Cast-in-Place
Concrete" for formwork, reinforcement, and concrete.
Grout:
ASTM C 1107, Grade B, factory-mixed and -packaged nonshrink and nonmetallic grout;
suitable for interior and exterior applications.
Characteristics: Post-hardening, volume-adjusting, dry, hydraulic-cement grout.
Properties: Nonstaining, noncorrosive, and nongaseous.
Design Mix: 5000-psi28-day compressive strength.
PART 3 - EXECUTION
3.1
EXPANSION FITTING INSTALLATION
Install expansion fittings according to manufacturer's written instructions.
Install expansion fittings in sizes matching pipe size in which they are installed.
Align expansion fittings to avoid end-loading and torsional stress.
3.2
PIPE BEND AND LOOP INSTALLATION
Install pipe bends and loops cold-sprung in tension or compression as required to partly absorb tension
or compression produced during anticipated change in temperature.
Attach pipe bends and loops to anchors.
Steel Anchors: Attach by welding. Comply with ASME B31.9 and ASME Boiler and Pressure
Vessel Code: Section IX, "Welding and Brazing Qualifications."
Concrete Anchors: Attach by fasteners. Follow fastener manufacturer's written instructions.
3.3
SWING CONNECTIONS
Connect risers and branch connections to mains with at least five pipe fittings, including tee in main.
Connect risers and branch connections to terminal units with at least four pipe fittings, including tee in
riser.
Connect mains and branch connections to terminal units with at least four pipe fittings, including tee in
main.
3.4
GUIDE INSTALLATION
Install guides on piping adjoining expansion fittings and loops.
Attach guides to pipe and secure to building structure.
3.5
ANCHOR INSTALLATION
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Install anchors at 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 steel anchors by welding steel shapes, plates, and bars to piping and to structure.
Comply with ASME B31.9 and AWS D1.1.
Construct concrete anchors of poured-in-place concrete of dimensions indicated and include
embedded fasteners.
Install pipe anchors according to expansion fitting manufacturer's written instructions if expansion
fittings are indicated.
Use grout to form flat bearing surfaces for expansion fittings, guides, and anchors installed on or in
concrete.
3.6
PAINTING
Touching Up: Cleaning and touchup painting of field welds, bolted connections, and abraded areas of
shop paint on miscellaneous metal are specified in Division 9 Section "Painting."
Galvanized Surfaces: Clean welds, bolted connections, and abraded areas and apply galvanizingrepair paint to comply with ASTM A 780.
END OF SECTION
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