Steel Pipe Adapters

Conformance

• SAE J514 for hex nipples, expanders, elbows, tees and crosses.
• SAE J514, J530 and J531 for bushings and plugs.

Materials

• Steel - Carbon steel zinc plated with yellow Dichromate per ASTM B33-98 (Type II SC-2)
• Stainless - Type 316 for all except 5400-N and 5400-CL which are Type 304 or 316.

Styles

• Barstock
• Forged
• Chamfered male ends have an internal 30° chamfer to mate with NPSM female swivel union connections. Many pipe fittings do not have this chamfer, as it is not required per SAE J514 standard.

Ordering

Working Pressures

Tompkins and SAE recommend sufficient testing be conducted to assure that performance levels will be safe and satisfactory on all NPTF pipe fittings, especially if installed in systems operating at elevated pressures or in severe conditions.

CAUTION: Although most pipe fittings have sufficient structural integrity to support the weight of many components, Tompkins recommends consulting with our technical support department for guidance in selection of parts used in this type of application.

SAE J514 NPTF Pipe Working Pressures

NPTF Dry Seal Pipe Assembly Instructions

• Step 1. Inspect port and fitting to ensure that both are free of contaminants and excessive burrs and nicks.
• Step 2. Apply a stripe of an anaerobic liquid pipe sealant around the male threads leaving the first two threads uncovered. If no liquid sealant is available, wrap Teflon tape 1 1/2 to 2 turns in a clockwise direction, viewed from the pipe end, leaving the first two threads uncovered. CAUTION: Teflon tape and some pipe sealants are destructive to hydraulic components. Always use extreme caution and follow manufacturer's recommendations for proper application of any sealant in order to prevent contamination.
• Step 3. Screw finger-tight into the port.
• Step 4. Wrench-tighten the fitting to the correct Turns Past Finger Tight position. (See following table.) When installing elbows or tees, consider final orientation position as to not exceed the recommended TPFT. A properly assembled fitting's total thread engagement should be 3.5-6 turns. CAUTION: Never back off an installed pipe fitting to achieve proper alignment. Loosening installed pipe fittings will corrupt the seal and contribute to leakage and failure.

Torque installation of pipe fittings is not a recommended practice. Thread taper and quality, different port and fitting materials, plating thickness and types, varying thread sealants, orientation, and other factors reduce the reliability of a torqued connection. If torque installation is required, refer to the following table for suggested torque values.