D. Reinforcing Pads
Reinforcing pads shall be installed only where called for on the piping drawing. Pad material shall be the same as the pipe material, unless otherwise authorized by the Company or Company Representative. Drawing shall specify size and pad thickness. A maximum of 1/16” clear between the pipe and pad plate is allowed. It is preferable to have pad shapes similar, but the pad size may be altered, provided an equivalent cross-sectional area is maintained and code requirements are met. Each pad, or each piece, if the pad is made from more than one piece, shall have a 1/8 of an inch vent hole, drilled and tapped 1/8 NPT (American National Taper Pipe Thread) prior to installation (at the side and not at the crotch) of the pad. Each pad or each piece shall be pressure tested with shop air at 15 psig for a reasonable time to insure a sound weld. After pressure test, the vent shall be filled with a grease compound. All required examinations and repairs shall be completed and approved prior to the cutting run (header) pipe.
D. Reinforcing Pads Reinforcing pads shall be installed only where called for on the piping drawing. Pad material shall be the same as the pipe material, unless otherwise authorized by the Company or Company Representative. Drawing shall specify size and pad thickness. A maximum of 1/16” clear between the pipe and pad plate is allowed. It is preferable to have pad shapes similar, but the pad size may be altered, provided an equivalent cross-sectional area is maintained and code requirements are met. Each pad, or each piece, if the pad is made from more than one piece, shall have a 1/8 of an inch vent hole, drilled and tapped 1/8 NPT (American National Taper Pipe Thread) prior to installation (at the side and not at the crotch) of the pad. Each pad or each piece shall be pressure tested with shop air at 15 psig for a reasonable time to insure a sound weld. After pressure test, the vent shall be filled with a grease compound. All required examinations and repairs shall be completed and approved prior to the cutting run (header) pipe.
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