PROTEC was contracted by a globally recognized oilfield service and supply company to design, manufacture and test an offshore IRS HPU. The HPU had to meet IEC 60079 Class 1, Zone 2 hazardous area classification requirements. The HPU is water/glycol based and meets NAS 1638 Class 6/SAE AS4059C Class 6 (B-F), cleanliness levels. All metallic material in contact with the hydraulic fluid is 316, 316L stainless steel. The hydraulic fluid reservoir is 316 stainless steel (350 Gal Supply, 150 Gal Return).  The structural frame is carbon steel with offshore marine coating and the frame and lifting pad eyes are built in accordance with DNV 2.7-1. There is a 5,500 psig low pressure circuit with four 10-gallon bladder type accumulators and two 30 HP motor driven 5 GPM piston pumps and an air driven auxiliary pump. There is a 15,000 psig high pressure circuit with two 5-gallon piston type accumulators and two 25 HP motor driven 2 GPM piston pumps and an air driven auxiliary pump. The HPU contains a stand-alone PLC based control system with graphical operator interface station on the HPU control cabinet and provides for communication links to the master control station on the offshore platform. The HPU contains a separate PLC operated electrical over pneumatic over hydraulic ESD (emergency shut down) system with a dedicated uninterruptible power supply (UPS).

The HPU was built in accordance with customer specifications and PROTEC’s own ISO 9001:2008 manufacturing and testing procedures. The HPU was built on time and on budget and customer has complimented PROTEC for its high level of quality and workmanship.