Field Installation Pressure Vessel & Heat Exchanger
Decundi Inspection Services provides inspection service to operating facilities (refineries, petrochemical plants and privately held operating facilities) to carry out inspections during decommission and demolition plus installation of new pressure vessels, piping, flanges, elbows, weldolets, couplings, valves and pressure safety valves (PSV’s). Activities associated with the above referenced tasks of decommissioning through the installation of PSV’s include removal of the old pressure vessels, piping and associated components plus removal of various nozzles and or manways on the old pressure vessels rendering them unable for further use.
Following the removal of the old pressure vessels and piping, Decundi inspection personnel who are fully versed in these activities carry out inspections during the installation of new pressure vessels, piping, flanges, elbows, weldolets, couplings, valves and pressure safety valves (PSV’s) plus the welding operations and in this regard the assigned Decundi inspector carry out inspections of the welding consumables used for welding of the above referenced components (except for the pressure vessels, valves and PSV’s) for assurance that the welding consumables are the required type stated on the welding procedure specification (WPS). Inspections is also carried out for assurance the low hydrogen welding electrodes are stored in accordance with the requirements of AWS D1.1.
Decundi inspection personnel carry out inspections during the fit up and welding of piping, flanges, elbows, weldolets, couplings and assurance is made that as applicable, the weld preparation for these components have the required 60° included angle, 1/8” root opening and 1/16” landing for butt-welded joints and for compliance to ASME Section IX. Monitoring of the amperage and voltage is carried out during shielded metal arc welding of butt-welded joints for compliance with the WPS. Radiography is then carried out for all field butt-welded joints on piping and a review of the X-ray film is carried out by Decundi inspector.
Hydrostatic testing of the system is carried out and is followed by draining of the hydrotest fluids. The system is then turned over to the owner of the operation facility for custody, care, control and commissioning and Decundi certification is then issued to the owner. Decundi recently carried out the tasks associated with the above narrative for one of our clients.