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External line-up clamp for precise welding

Efficient centering solutions for pipeline and piping construction

Suitable for: Pipeline construction, piping construction, industrial welding work, plant construction, energy and utility companies

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  • Over 40 years of experience
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External line-up clamp: Precision and efficiency for welded joints in pipeline construction

The external line-up clamp for precise welding is the ideal solution for minimising edge misalignment on pipe joints. It is placed over the pipe joint and exerts stable pressure on the pipe ends using a hydraulic cylinder or mechanical force. With a hinged double ring and adjustable centering bridges, it allows up to 90 % of the root pass welding to be carried out without removing the clamp. Available in hydraulic and mechanical versions, it offers maximum flexibility for pipeline construction and other industrial welding applications.

Variants:

Pipe outer centering: Drop seam

Pipe outer centering: Drop seam

Ideal for precise welding work on specific pipe joints. Particularly suitable for demanding joints in pipeline and pipe construction.

External line-up clamp: Downhill welding clamp

External line-up clamp: Downhill welding clamp

Ideal for precise welding work on specific pipe joints. Particularly suitable for demanding joints in pipeline and piping construction.

External line-up clamp: Mechanical, light-duty

External line-up clamp: Mechanical, light-duty

The standard solutions in pipeline construction offer reliability and efficiency for everyday welding work on small to medium pipe diameters.

External line-up clamp: Mechanical, medium-duty

External line-up clamp: Mechanical, medium-duty

The standard solutions in pipeline construction offer reliability and efficiency for everyday welding work on medium to large pipe diameters.

Pipe outer centering: Hydraulic, round steel

Pipe outer centering: Hydraulic, round steel

Supplied with removable hydraulic cylinder (5.0 t pressure force) or optionally with ratchet tensioner. Adjusting screws enable precise fine adjustment.

Hydraulic cylinder for external line-up clamp: Hydraulic, round steel

Hydraulic cylinder for external line-up clamp: Hydraulic, round steel

Powerful and precise adjustment of the external line-up clamp – ideal for industrial applications

Ratchet clamp for external line-up clamp: Hydraulic, round steel

Ratchet clamp for external line-up clamp: Hydraulic, round steel

Manual and flexible solution for the safe alignment of pipes

External line-up clamp with fixed hydraulic cylinder, bridges and set screws

External line-up clamp with fixed hydraulic cylinder, bridges and set screws

For demanding and heavy-duty applications in piping construction. With fixed hydraulic cylinder (10.0 t pressure force), bridges and set screws for maximum stability and precision on heavy, large-diameter pipe connections.

External line-up clamp without bridges and set screws

External line-up clamp without bridges and set screws

For demanding and heavy-duty applications in piping construction. With fixed hydraulic cylinder (10.0 t pressure force) for maximum stability and precision on heavy, large-diameter pipe connections.

External line-up clamp: Extra heavy-duty

External line-up clamp: Extra heavy-duty

Most robust version with bridges and bolts and fixed hydraulic cylinder (20.0 t pressure force). Developed for extreme loads and the highest demands in industrial pipeline construction.

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Detailed product description

Precision and efficiency for pipe connections

The external line-up clamp – also known as external pipe centering clamp – is placed over the joint of two pipes and minimises edge misalignment through controlled pressure. The hydraulic cylinder of the most powerful version generates up to 5 tonnes of pressure, while mechanical models work with stable screw connections. This ensures precise weld seams and stable connections – indispensable in piping construction and industrial welding work.

The external line-up clamp is available in different versions. Medium-duty models are made of round tube, while the heavy-duty version is reinforced with flat material. These designs guarantee durability and stability, even with intensive use.

Easy handling and fast operational readiness

The external line-up clamp stands out for its user-friendly design. Thanks to the hinged double ring and the adjustable centering bridges, the tool can be quickly and easily adapted to pipe diameters from DN 80 to DN 1600. These features make it the ideal choice for pipeline construction projects where the focus is on efficiency and time savings.

Flexibility with different pipe diameters

Whether small or large pipe diameters – the external line-up clamp offers a flexible solution. Thanks to the versatile variants, pipes from DN 80 to DN 1600 can be used. This makes them indispensable for applications in piping and welding technology where precision is required for changing requirements.

High level of occupational safety during welding work

A safe working environment is essential, especially in industrial piping construction. The precise alignment of the pipes minimizes edge misalignment and reduces the risk of errors or accidents. The robust design also ensures a firm hold during the entire welding process – regardless of whether hydraulic or mechanical models are used.

Customers and partners

Technical details

  • Pipe diameter: DN 80 – DN 1600
  • Maximum compressive force: Up to 20 tons
  • Centering performance: Up to 90 % of the root passes can be welded without releasing the clamp.
  • Material thickness (depending on version): 4 mm – 8 mm
  • Dimensions (transport condition): approx. 500 mm – 1200 mm (depending on model)

The exact technical details differ depending on the variant. The Pipeline Equipment team will be happy to advise you on selecting the right external line-up clamp for your requirements.

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Big projects - big responsibility: With over 40 years of experience, we work in partnership on international pipeline and plant construction projects. We provide comprehensive support for your pipeline project and offer you high-quality machines and accessories as well as reliable services from a single source. We value the partnership-based cooperation with our international customers. Fast project planning, flexible express logistics and competent on-site advice are a matter of course for us before and during the project phase.

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  • Express delivery worldwide
  • Maintenance and repair included
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  • Used and new products
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  • Free consultation and planning

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