STOPPLE High Pressure Fittings 14" Through 48" - STOPPLE Plugging Fittings, 14" through 48", are also full branch fittings. They are equipped with LOCK-O-RING Flanges and plugs, which are used as a means of recovering the tapping valves after a STOPPLE plugging operation
After the plugging job is completed, the LOCK-O-RING Plug is installed in the fitting flange and LOCK-O-RING Segments are extended into a groove in the plug, holding the plug in place. An O-ring in the plug provides a pressure-tight seal. After it has been confirmed pressure tight, the tapping machine and valve are removed, and a blind flange is installed.
At a future date, the blind flange may be removed, a valve installed and the LOCK-O-RING Plug may be removed, regaining access to the pipeline
-Flange-to-sleeve weld joints and sleeves are designed to meet pressure and reinforcement requirements of ASME codes, and are available in Class 150, 300 and 600. Other ASME Class ratings available upon request.
-Fittings are manufactured with a controlled carbon equivalent to make welding easier in harsh environments. Back-up strips are provided for all fittings.
-All pressure-containing welds on the fittings have undergone X-ray inspection per ASME requirements.
-Fitting sleeves are an extruded type design. They are manufactured from a pressure-vessel quality, normalized, killed carbon steel plate with hardness below Rc22.
-The Charpy impact value of the sleeves at -50°F is 15 ft-lbs average with 12 ft-lbs minimum.
-Rapid delivery: If the desired fitting meets standard specifications, it can be shipped from stock or within two weeks in most cases.
-Choice of flanges.
-Available also to ASME B31.4 and B31.8 specifications