HiStop^®

Team’s patented high temperature, high pressure (HTHP) HiStops® are used primarily to solve maintenance and engineering problems where operating conditions exceed conventional line stop ranges.

HiStops can be used to isolate pipes from 1/2" to 16" in size, with temperatures to 1,200°F (649°C) and pressures to 2,600 psig (179 Bar).

Team has successfully stopped a 6" boiler feedwater line leaking water at the rate of 1,650 gpm and flowing at a velocity of 22 ft/sec. Pressure was 2,100 psig at 400°F. The company stopped another 6" boiler feedwater line at 2,300 psig and 350°F.

Team’s advanced HiStop methods utilize patented techniques and equipment such as the metal-to-metal seal between the plug and the line.

Basic engineering techniques applied to the Team HiStop includes (A) the installation and pressure testing of a special HiStop fitting welded to the pipe, the installation of the valve, and the (B) precision cutting and reaming operation to make a tapered hole through the pipe. The pipe is then plugged (C) with a precision-ground, tapered steel plug that provides the seal to the pipe. This permits the depressuring of the system for the necessary maintenance or project work. A completion plug (D) with metal-to-metal seal and O-ring backup to permit HTHP operations is installed in the flange, thus allowing removal of the service valve and completion of the job.