PTFE hose manufacture involves forming the fluid-carrying tube, providing the required reinforcement and preparing the end connections. The precise production sequence depends on the hose design and manufacturing method.
Tube construction
The PTFE tube forms the inner fluid path. The original article describes tube formation by extrusion and discusses layered constructions. These descriptions should not be treated as a single production method used for every PTFE hose.
Dimensions and tube construction are selected for the required assembly. The connection arrangement must also be compatible with the hose and the intended service.
Reinforcement and processing
A load-bearing braid provides reinforcement around the tube. Stainless steel braid is commonly used for assemblies of the type presented on this website. The method of securing the reinforcement and fittings is part of the assembly design.
The source also discusses thermal processing. The processing sequence and final properties are specific to the product and must be confirmed from its manufacturing documentation.
Convoluted PTFE hoses
Convoluted hoses require an additional forming stage to create the profile of the tube. The shape and dimensions of the convolutions depend on the design requirements.
The tube can then be reinforced with stainless steel braid. A convoluted profile can provide flexibility for installations with more complex routing, while the reinforcement supports the pressure capability of the assembly.
From construction to application
The finished hose must be selected for the conveyed liquid or gas and the operating conditions. Chemical resistance, flexibility and pressure capability depend on the complete construction.
This is an adapted overview of the source article. Details of the manufacturing process, inspection and ratings for a specific LLETALL assembly are available on request.