Female Threaded Welding
Branch Connection
MT-40
Installation Information

• The hole cut in the run pipe may be done prior to welding or after welding of the outlet fitting. If holes are cut prior to welding, see recommended hole size in chart on engineering dimension data page located here.
• SPF™ Outlet Fittings are designed to be installed using only one weld pass.
• 1/2" size outlets have a heavy cross section which helps maintain shape and threads during shipping and from weld / heat distortion after installation.
• 3/4"-2" size outlets maintain a relative uniform wall thickness in the contoured section. Heat settings can easily be set to allow for full penetration welds while reducing the probability of burn through. The weld area is designed adequately distanced from the threads such that the welding process should not distort the threads.
• It is recomended that the weld temperature be only as hot as needed to fully penetrate the materials being welded. Excesive heat may cause the outlet fitting to expand excessively resulting in threads not gauging properly after cooling. The following chart lists the recommended amount of weld for each size outlet.

A. Prior to installing a threaded branch pipe or nipple into a MT-40 outlet fitting, inspect the thread of the outlet and the nipple to insure that:

1) No dirt or weld spatter is in the threads.
2) No burn-through has damaged the threads.
3) Thread length is correct.

B. Clean as needed.

APPLICATION OF PIPE SEALANT

A. Use a pipe sealant that is fast drying, sets-up semi-hard and is vibration resistant. For outlets 1/2" through 1", an anaerobic pipe sealant is recommended.

B. Thread tape containing Teflon* may also be used.

TIGHTENING OF BRANCH PIPE

A. For outlet sizes through 2", wrench tighten up to three (3) full turns past handtight.

*Teflon is a registered trademark of DuPont