Categories > Casing split pipe

Split Casings - Protect Existing Pipelines
Encasement - Split Ducts for Conduit - Pipes - Cables

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"Hexagonal Split casing - Less handling weight - Greater protection

Split Casing Protection - Existing Pipes

Split Casings: WA-HEX- UNITS are hexagon steel structures providing mechanical protection for existing pipelines. Split sections are manufactured forms - not split pipe.

Split casings provide high strength secondary protection. Gasket seals between the joint flanges offer water protection, end closing seals (WA-GP units) seals the annular space at the end of the split casings. Casing spacer (positioners) hold the carrier pipe suspended in the casing. Steel reinforcement flanges add extra strength.

Bolt closed, no welding required: Installation is accomplished with the pipeline in service, shutdown is not required. Split casings Hex models fit all American and International pipe sizes.

Hex-split casing can be installed by most contractors, specialized jack and bore equipment is not required.

split-casing-installation-protect-existing-pipesApplications:

Protection in fuel farm tank projects for existing gas and oil pipes through earth containment berms or bund walls.

Protection for existing pipelines under cross over rail tracks, roads and other crossover projects. Add protect for existing pipelines under new building foot prints.

Split casing protect and isolate waterlines and sewer lines that run close together.

Protect communication cables and power supply cables.

Provide utility corridors for service entries.

Rib flange former collars provide stability, and strength to the split casing. Casing ends may be closed or open.

Sizing: from 5 inch - 48 inch standard (125mm to 1200mm) larger split casing available on request.

Material: galvanized steel, 304L or 316L stainless steel or primed carbon steel.

Flange Gaskets: seal material EDPM for water applications or NBR elastomers for oil and gas applications.

Casing Spacer "positioners" support the pipe in the casing.

WA-Hex (Hexagonal split casing) ships ready to install with all necessary material.

Download data cut sheet



Split Ducts: Protection for under ground power cables, communication cables and fiber optic cables.

WA-Hex split ducts; provide mechanical protection for conduit, power cables and communication lines.

The bottom half placement creates a split channel for the cables and conduits. After placement the top half of the split duct bolts to the bottom half, forming a protective chamber.

Welding is not required, no possibility of heat damage to cables or conduit.

Split ducts help protected power cables from excavation events.

Non-metallic wheel insulators position and protect the carrier conduit or cable bundles. Axial movement of the power cable and conduit is possible. Split duct systems are placed by open cut trenching. The steel ducts provide added mechanical protection for power, gas and communication lines.

Multiple conduit pipe or cable wires may be strapped and placed in the ducts. For under water conduit runs, 316L material casings may be used.

HDPE casing spacers, gaskets and bolting are supplied as part of the split assembly. Split duct materials may be galvanized steel, 304L and 316L steel. End sealing for multiple conduit or power cables are supplied with the assembly if required.

Placement of Split casings

Weld the bottom lengths in place first for several lengths, followed by the top sections. Field conditions may require a different sequence and is a contractor choice.

Normally only expose an existing carrier pipe length so that non-excavated earth supports the pipe. Place split casing lengths under that section length before moving on. Field contractors may modify method of exposing existing carrier pipes to meet other requirements.

Contact us for a quote on your project

 

Basic structures may be modified to accommodate existing field conditions.

Download Cut Sheet

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Sample Sketch


Split Casing - Cylindrical - Bolt closing split casing

For existing pipes

Pipeline remains in service during install

WA.BC split casing pipe.

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WA-BC Split casing for existing pipeline protection. Bolted closing split casings are ideal solutions for gas and oil media pipelines that cross through earth Containment Berms.

Bolt closed split casings provide protection when railways and roadways crossing over existing pipelines. Or where existing pipes need secondary protection from building foundations, sign foundations or other structures.

The half moon sections bolt together through flange to flange bolting points. EDPM or NBR gaskets are provided between the flanges. Casing spaces (POSITIONERS) hold the carrier pipe off the bottom of the casing wall. End seals are supplied with the assembly if required.

Exterior rib flanges add strength and stability to the sections. Special casing end connectors or flange ends may form part of the assembly depending on requirements. Casing ends may be sealed with Modular Seal links or compression disk seals.

Install procedures - may vary:

- Expose existing pipe only to the lengths that can be supported by the remaining earth support. Place the bottom sections around the existing carrier pipe with the casing spacer support legs in place around the carrier.

- Under the bottom split casing compact soil and/or concrete must support the split casing sections: with the first section supported, the casing spacer legs now support the pipe and excavations for the next section may continue.

- Place the bottom lengths first for several lengths, followed by placement of the top sections. Field conditions may require a different sequence and is a contractor choice.

- Normally only expose an existing carrier pipe length so that non-excavated earth supports the pipe. Place split casing lengths under the exposed section length and bolt the end flanges together before moving on. Field contractors may modify method of exposing existing carrier pipes and placement of the split casing to meet other field requirements.

 


Split Casing pipe - Weld closing - Cylindrical Split Casings

split-casing-protect-existing-pipelinesSplit casing pipe welded closing WA-WC units: protect existing pipelines. They ship in 2 m lengths or other cut lengths.

Bevel edges provide weld bead reception slots for closing the units around existing carriers.

Existing pipeline remains in service during placement of the split casing.

Casing spacers hold the carrier pipe suspended in the casing and are supplied with the split casing.

Steel sections are not corrosion protected but a coating as per customer requirements may be applied in the field after closure procedures are complete. 304L stainless steel sections may be ordered as well.

Weld closed split casing protect large or small diameters carrier pipes. Section lengths and casing type are defined by the customer.

The total run required is obtained by welding lengths together in the field. Special protective sheets may be attached to the inner surface of the sections.

Grip hooks may be attached for assist lifting. Normally strap lifting is used as a means of lifting the half moon sections into position.

Weld the bottom lengths in place first for several lengths, followed by the top sections. Field conditions may require a different sequence and is a contractor choice.

Normally only expose an existing carrier pipe length so that non-excavated earth supports the pipe. Place split casing lengths under that section length before moving on. Field contractors may modify method of exposing existing carrier pipes to meet other requirements.

Non-Metallic casing spacers are normally used for positioning carrier pipes in split casings.


Casing carrier pipes not centered - Casing pipe not round

Eccentric seals WA-GP-UM eccentric seals.

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WA-GP-UM seals do not require the carrier pipe to be centered in the casing. Split models are available for existing pipes.

Carrier pipes below or above the center position may be sealed. Large annular spaces may be sealed by installing WA-GP- UM seals.

Eccentric pipe seals conform to the carrier pipe exist position. The opening in the GP-UM depends on the height of the casing spacer leg being used.

The plain of the carrier pipe through the casing determines the seal opening center.

E.g. a pipe would be considered to be fully (100%) eccentric it were lying against the inside diameter of the wall sleeve or core hole. A pipe would be said to be concentric (0% eccentric) if it were perfectly centered in the outer pipe or hole.

WA.GP-UM eccentric disk-seals are used to seal - off center carrier pipes.

Download cut sheet

Oval seals for out of round pipe casing.

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Steel pipe casing that is out of round may be sealed with a WA-GP-OV seal. WA-GP-OV seals are custom built to form a watertight seal.

Materials are EDPM or NBR elastomer with stainless steel compression plates and hardware.

 

 

Measures required

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Download a measure fill-in sheet:

 

 

 

 

 

 

- Record measures from the carrier pipe OD to the casing Pipe ID - for each point in a 24 hour clock.

- Measures should be perpendicular to the carries pipe and the casing

- Run a straight line for example from the 6 o'clock to 12 o'clock sections.

 

For ordering contact us: Westatlantic Tech Corp.,, 902 455 4455

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