Crystal's high pressure access fittings from India are specialized piping arrangements that allow access internally to vessels of production plants and pipework being operated upon under full process conditions. For such access systems, the corrosion monitoring industry standard is based upon a nominal bore design of 2 inch. During operation along with a Retrieval Tool and Service Valve, high pressure access fittings allow the installation and retrieval of:

probes
coupon holders
sampling probes and chemical injection, nozzles and quills

These devices allow the installation and safe retrieval without plant shutdown, at working pressures of up to 3,600 psi.

Most frequently, high pressure access fittings are used in oil and gas production. In these kind of high pressure operations, users are reluctant to shut down and depressurize process systems to allow removal or installation of corrosion monitoring devices.