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Certainty Through Innovation

CORE Service® Spread

What does our field service spread consist of?

Our field service spread consists of: a trackhoe, Walter, fusion processors, all required tools, trucks, trailers, and quads. Crews vary in size from 3 to 5 people (i.e. Foreman, lead hand, electrofusion technician, labourer).

Field Operations

Division of Responsibilities & Work

The breakdown below is intended to highlight the division of responsibilities and work between CORE Service® and the pipeline contractor. At a high level the CORE Service® team replaces conventional welding and liner crews. All other activities on your project will operate as they normally would with a steel contractor.

Contractor Responsibilities:

  • Licenses and permits
  • Site preparation and access
  • Pipeline right-of-way preparation (min 15m / 50ft)
  • Strip, ditch, lower, and backfill
  • Pipe stringing including all equipment and personnel
  • Minimum 1m / 3.3ft required between multiple lines in ditch to complete in ditch tie-in
    • Standard steel pipe spacing is acceptable for final ditch position
  • Pipe handling, positioning, rotating, aligning, and stabbing
  • Field bending
  • Equipment, material, and personnel for crossings/bores/HDD
  • Installation of external corrosion protection on ClickWeld® joint
  • Pipe jeeping
  • Supply and installation of coating repair materials and personnel
  • Support pile and hardware for risers
  • Bolt up of all flanges, including supply of studs, washers, and nuts
  • Flange electrical isolation material
  • Hydrotest including fluids and disposal
  • Supply and install consumables as needed
  • Pipeline quality control
  • Reclamation of ROW including back fill
  • All other typical activities not specified under CORE’s scope of work

CORE Required Support from Contractor:

CORE Linepipe® requires the following support from the contractor:

  • In-field CORE Linepipe® equipment mobilization
  • Mainline – dedicated side boom with operator and personnel (100% of joining duration) to support the CORE Service® team
    • In the absence of dedicated support equipment, the ClickWeld® process cannot be completed.
  • Tie-ins – Two lifting implements are required to support the CORE Service® team for in the ditch tie-ins and risers (additional equipment may be needed depending on project conditions)
  • Excavation of bell holes to CORE specifications (tie-in access)


Scope of CORE Service® (included in day rate):

  • Review of drawings
  • Site visit – suggested for projects over 3.11mi’s (5km’s)
  • Coordinate delivery of pipe, bends, and ancillary materials to site
  • Joining of all ClickWeld® joints
  • Supply ClickWeld® pull head
  • Supply ClickWeld® QC package
  • Supply material MTRs


Purchased from CORE Linepipe® by Customer:

  • Supply of CORE Liner® product (Gateway Tubulars)
  • Mob/Demob of CORE Liner® crew and equipment
  • Pipe freight
  • Supply of CORE Liner® risers/ROW bends
    • Bends between 30 to 90 degrees are recommended to be factory bent
  • Supply of ClickWeld® flanges and transition pups
  • Supply of shrink sleeves (1 per ClickWeld®)
  • Supply and install riser vents

ClickWeld & Walter

Bends & Risers


  • CORE Liner® should be bent cold to a minimum radius of 20D
  • Bends larger than 30 degrees should be factory bent and must be pre-ordered
  • Sign-off on ROW bend requirements (quantity and angle) is required by customer prior to bending


  • Risers are factory bent and must be pre-ordered
  • Sign-off on CORE Liner® riser drawings is required by customer prior to bending
  • A minimum of two separate lifting devices (track hoe, side boom, picker) are required for installation
  • CORE Liner® risers should be supported as per industry best practices or company policy
  • Care should be taken to ensure that ditch depth and riser support options accommodate the riser dimensions
    • Red line drawings can be provided after bends are complete
  • CORE Service® utilizes the standard inventory that is shipped to the project site and recreates the ClickWeld® assembly utilizing our patented equipment and process (“Walter”). This allows us to install precisely measured inline joints or flanged end fittings.
  • There is NO welding required in this process. No pre-ordered fixed length PUPS are required


Flanges are applied using our patented ClickWeld® system. Each flange connection comes with an HDPE stub-end and electrofusion to easily connect to an existing CORE Liner® pipeline. The flange assembly design has eliminated strain on the HDPE stub end, thereby eliminating a failure mode common to other liner systems. Each riser assembly comes with flanges pre-installed and allows our customers to have a corrosion-resistant pipeline from flange to flange, without having to worry about expensive internal coatings.


CORE Linepipe® arrives on specially designed pipe bunks (provided by CORE) and can be uploaded using conventional slings, vacuum, or other approved methods.

*Pipe ends are not be hooked. This can potentially damage the mandrel or liner ends of our pipeline liner system.

  • Ensure appropriate lifting devices are in place according to customer’s safety standards
  • Orientation of pipe to be determined at pre-job meeting (factory and field end, directional stringing required)
  • Flange fittings are applied to CORE Liner® product using our proprietary ClickWeld® process
  • Core Liner® has a male and female mechanical assembly, this makes construction directional. Specific consideration is required when planning HDD and bores to ensure efficiency. Properly planning bores can avoid wasted time on site as well as wasted materials
  • If possible, tall tubs are preferred
  • Pipe to be double tubbed, tubs to be placed a minimum of 3.5m (11.5ft) from the end of the pipe
  • Pipe is to be strung to ensure that the factory ring (mechanical male end) is aligned with the field bell (mechanical female end)
  • Special care is to taken at all times to ensure that the ends of each joint of pipe is not damaged
  • Do not unpack or unwrap the ends of the CORE Linepipe®. Please leave this until you are directed by the CORE Service® team


CORE Linepipe® products are compatible with HDD and boring scenarios.

CORE Linepipe® has developed custom pull heads to be used when pulling drag sections of CORE Liner®. The pull heads are specially designed to eliminate damage to the mandrel while providing excellent tensile pull capability.

 The reusable CORE pull head can only attach to the factory end mandrel. Keep this configuration in mind when planning the directionality of a bore pull. It is possible to reverse the direction to accommodate nonconforming bore directions, but this will lead to extra work time and costs (i.e. welded pull head or transition pup).

 To facilitate tie-in locations, ensure a minimum of 32.8 feet (10 meters) of pipe protrudes from the bore entry and exit.

Follow the below guidance for a successful pull job:

  1. Ensure plugs, seals, and shrink sleeves are installed prior to pulling the drag section.
  2. The leading edge of shrink sleeves should be protected to avoid damage. A Thrust-Bore Kit, Scar-Guard, or other protection is recommended on HDD sections.
  3. The custom pull head, steel bell cover, and mandrel sealing plug must be used to eliminate damage and debris from entering the ClickWeld® joint.
  4. Precautions should be taken to protect external coating of lined pipe if being installed into a bore casing (as per standard steel line pipe practices).
  5. The pipe section must be pulled from the factory end side (male mechanical end).

*Parameters listed above are based on typical bore/HDD scenarios. Please consult CORE Linepipe® for any job specific considerations.

*Consultation with HDD contractor is recommended.

*Care must be taken to ensure no dirt or contaminants enter the pipeline. Electrofusions that come in contact with any drilling fluid must be cut out. Please review with your CORE Service® team.

**No special design considerations required for torsional force. Use standard Engineering design limits for the base steel pipe.


  • Above ground or below ground tie-ins can be accommodated
  • CORE Liner® requires a minimum of 3+ joint length gap opening
  • Flange fittings are applied to CORE Liner® product using our proprietary ClickWeld® process
  • *CORE Linepipe® does not apply external protection to flange assemblies. It is recommended that the contractor apply denso tape or equivalent to flange assembly
  • CORE Liner® field crews are able to cut pipes to custom length on location using standard CORE Liner® product
  • A minimum of 2-Lifting units for tie-ins


  • An important consideration when planning a CORE Liner® crossing is joint/bend orientation
  • Careful consideration and planning should be taken to ensure a minimum of 60m (200ft) straight section
  • At all times ClickWeld® joints should be in straight sections of pipe, and at no time should the ClickWeld® joint on the bent section
  • Roped bends or long sweeping bends react the same as conventional line pipe and are easily incorporated into the CORE Linepipe® system design
  • Drag sections can be considered and treated just as conventional steel line pipe would be
  • CORE Liner® field crews are able to cut pipes to custom length on location using standard CORE Liner® product

Flow Joints

Flow T’s and Y laterals must be constructed using lap joint flanges and are easily integrated into our system. As CORE Liner® is a corrosion resistant system, flow joints must be coated with appropriate product to meet the demands of the intended service.

Special consideration should be given to changes of internal diameter in the flow joint as it relates to pigging practices. Please ensure that you use ONLY CORE Linepipe® approved pigs.

CORE Linepipe® does not supply custom flow joints at this time, for guidance please contact your representative.

Section View

Trucking & Weights

Interested in using CORE Linepipe®?

Contact a CORE representative to get a custom solution!