TPCO TP-SFJ: An Integral Semi-Flush Premium Connection with Dual Seals

TPCO’s official product information identifies TP-SFJ as an integral semi-flush premium connection. Its published design combines dual sealing surfaces, internal and external shoulders, and upset pipe ends. [1]

For buyers researching Chinese premium connections, these details provide a useful starting point for understanding TP-SFJ and preparing enquiries for matching accessories.

Sealing, Make-Up Positioning and Connection Strength

According to TPCO, the dual-seal arrangement supports gas sealing under internal and external pressure loads. The internal and external shoulders control make-up positioning, while pipe-end upsetting enables a connection efficiency equivalent to 60–70% of the pipe-body yield strength. [1]

The published efficiency figure is a connection design characteristic. It should be considered with the complete product specification when evaluating a particular size, material and operating requirement.

Preparing Matching Pup Joints and Crossovers

A project specifying TP-SFJ may also require custom-length pup joints or crossovers connecting different components. For these accessories, a complete enquiry should identify both the connection and the required component geometry.

The outside diameter, wall thickness, bore, overall length and end configuration should be defined together. Because TPCO’s description includes upset pipe ends, the available blank dimensions and machining allowance deserve early review.

For a crossover with different connections at each end, drawings should clearly identify both interfaces. This helps the customer and manufacturer assess whether the proposed material and dimensions provide a workable manufacturing route.

Authorized TP-SFJ Machining Support from SWS

TP-SFJ is explicitly listed on SWS’s TPCO authorization certificate. Within the applicable licence agreement, SWS provides pin-thread and single-ended box-thread machining support for custom accessories.

Customers can submit drawings for pup joints, crossovers and other threaded components. We accept customer-supplied material and can also assess material supply and complete component manufacturing.

Our minimum order quantity for premium-thread products is one piece. Small-batch and urgent requirements are reviewed against material availability, machining feasibility, inspection requirements and the requested delivery schedule.

Quality documentation and traceability requirements can be discussed during the enquiry stage, helping customers define the records needed alongside the finished components.

If your project requires TP-SFJ accessories, send SWS your drawings, material grade, dimensions, end connections, quantity and required delivery date. We welcome the opportunity to review the details and discuss a suitable manufacturing solution.