Single Braid PTFE Hose Assembly and Fitting Guide Using Tube and Braided OD from 5/32 to 1 Inch

JINGCHENG Single Braid PTFE Hose (series JCC-01100-PTFE) covers a smooth PTFE inner hose with one layer of high-strength 304 stainless steel braided wire for machinery, electronic, automotive, medical, aerospace, chemical and energy equipment from -70°C to +260°C. This page explains how to match fitting stems and sockets to the inner, tube outer and braided outer diameters in the catalog, calculate cut length, assemble without damaging the PTFE liner and confirm the pressure rating of the finished assembly.

Building a Reliable Single Braid PTFE Hose Assembly

The JINGCHENG JCC-01100-PTFE hose has a smooth PTFE hose as the inner layer, covered with one layer of high-strength 304 stainless steel braided wire as the reinforcing outer layer. It works from -70°C to +260°C and is used in machinery, electronic and electrical appliances, automotive, medical, aerospace, chemical, computer, energy, military and communications equipment. Because the braid carries the pressure, an assembly is only as good as its fittings and the way they are matched to the hose. This guide explains which catalog dimensions matter when you specify or build an assembly.

The Catalog Dimensions You Need

Unlike a bare tube, a braided hose has three diameters that matter for fittings: the inner diameter of the PTFE tube, the outer diameter of the PTFE tube, and the outer diameter of the finished braided hose.

Data source: JINGCHENG PTFE Hose Catalog (JCC-01100-PTFE Series). Operating temperature range: -70°C to +260°C. All specifications can be customized according to customer parameters.

Step 1: Match the Fitting Insert to the Inner Diameter

The insert (stem) of the fitting goes inside the PTFE tube. Choose it for the catalog inner diameter of the size, for example 6.35 mm at 1/4" or 12.7 mm at 1/2". An insert that is too large can damage the PTFE wall during assembly; one that is too small will not seal reliably.

Step 2: Match the Socket to the Braided Outer Diameter

The socket or ferrule closes over the braid. Its bore must suit the braided outer diameter: 7 mm at 5/32", 9.6 mm at 1/4", 11.7 mm at 5/16", 13.6 mm at 3/8", 16.7 mm at 1/2", 19.6 mm at 5/8", 23.8 mm at 3/4" and 31 mm at 1". Using a socket meant for a different braided OD is one of the most common causes of assembly failure.

Step 3: Calculate the Cut Length

• Add the length of both fittings to the required overall assembly length, then deduct the portion of each fitting that the hose enters.

• If the hose will be bent in service, allow enough length to respect the minimum bend radius, from 42 mm at 5/32" to 260 mm at 1".

• Cut square and keep the braid ends tidy so no loose wires remain at the sealing area.

Step 4: Assemble Without Damaging the Liner

• Keep the PTFE end round and clean before inserting the stem.

• Push the hose fully into the socket so the braid is captured along the full grip length.

• Close the fitting evenly. Uneven pressing can leave the braid loose on one side.

Step 5: Check the Rating of the Complete Assembly

The working pressure of an assembly is limited by the weaker of the hose and the fittings. The hose itself is rated at:

• 42 MPa at 1/4", the highest in the range

• 27 MPa at 5/32", 23 MPa at 3/8" and 1/2", 19 MPa at 5/16"

• 18 MPa at 5/8", 15 MPa at 3/4" and 10 MPa at 1"

Burst pressure is roughly three times working pressure across the range and is not an operating figure. Make sure the fittings are rated for at least the same working pressure as the hose size you choose.

Step 6: Install the Finished Assembly

• Avoid twisting the assembly when tightening the end nuts; hold the hose body while turning the nut.

• Keep a straight section behind each fitting rather than bending right at the socket.

• Route away from sharp edges; the braid protects the liner, but it should not rub against equipment.

Assembly Checklist

Get JCC-01100-PTFE Hose or Assemblies

We supply the hose by the metre or as finished assemblies, and all specifications can be customized to customer parameters. Send the size, length, fitting types, medium, temperature and pressure, and our engineers will confirm the build.