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Hebei Longrun Pipeline Group Company is an API certified barred tee manufacturer specializing in the production of barred tees for piggable pipeline systems used in oil and gas transmission, petrochemical processing, and long-distance pipeline infrastructure. Barred tees are designed to prevent pipeline pigs, spheres, or cleaning tools from entering branch lines while allowing uninterrupted flow through the main pipeline.
A barred tee is a specialized pipe fitting that incorporates internal bars welded across the branch outlet. These bars act as a protective barrier to guide pigs through the main run of the pipeline while preventing accidental entry into side branches. This design helps reduce operational risks, equipment damage, and flow interruptions during pigging operations.
Barred tees are widely used in natural gas pipelines, crude oil transmission systems, compressor stations, and offshore pipeline networks where routine pigging is necessary for cleaning, inspection, or maintenance.
As an API certified manufacturer, Hebei Longrun Pipeline Group Company follows strict production and inspection procedures throughout the manufacturing process. Products are manufactured according to API requirements as well as ASME B16.9, MSS SP-75, ASTM material standards, and project-specific technical specifications.
API certification supports traceability, controlled manufacturing, and documented quality procedures, which are essential for pipeline projects operating under high pressure and demanding environmental conditions.
The factory manufactures barred tees in several material grades suitable for different applications, including:
Carbon steel for standard transmission systemsMaterials are sourced from qualified mills and undergo chemical composition analysis and mechanical property verification before entering production.
Production begins with seamless or welded tees formed through hot pressing, extrusion, or fabrication methods depending on size and wall thickness requirements. After the tee body is completed, internal bars are installed within the branch outlet according to project drawings and pigging specifications.
The bars are positioned carefully to ensure unrestricted flow while maintaining the required pig passage clearance. Welding procedures are performed by qualified operators following approved welding procedure specifications (WPS).
After fabrication, heat treatment processes such as normalizing or stress relieving may be applied to reduce residual stress and improve structural stability.
Each barred tee undergoes comprehensive inspection procedures, including:
Dimensional verificationHydrostatic testing and third-party inspection services can also be arranged according to project requirements. Traceability markings are applied to each fitting, including size, material grade, heat number, and production standard.
API certified barred tees manufactured by Hebei Longrun Pipeline Group Company are widely used in:
Natural gas transmission systemsThese fittings help maintain pipeline pigging efficiency while protecting branch connections and downstream equipment from operational interference.
