NORSOK standards are developed by the Norwegian petroleum industry to ensure adequate safety, value adding and cost effectiveness for petroleum industry and operations. The NORSOK standards also represent the “best practise” in the industry and are being adopted by companies also outside the NCS. The NORSOK R-004 Piping and equipment insulation covers the minimum requirement for thermal, acoustic, personnel protection and fire protection for pipes, valves, flanges, vessels, equipment etc. for offshore/onshore installations. The insulation Class 6, 7 and 8 specifies Acoustic insulation in order to ensure that noise emission from piping, valves, flanges and equipment meets the area noise requirements for the working environment as given in NORSOK S-002.
Based on documented insertion loss, each project may select the applicable class and select materials or combinations of materials to cover the required insertion loss at actual frequencies. Combination classes such as Class 56; fire and acoustic are also common. All systems shall be tested and the insertion loss documented in accordance with the measurement procedure outlined in ISO 15665, Clause 10. All materials shall also be tested and approved in the actual combination.
Benarx A range of products is designed to reduce noise levels both from pipes and valves, and from larger equipment using sound stop curtains. The Benarx A pipe jacket is typically used if no other insulation classes are required, and “Soundstop” material is used in conjunction with other material such as cellular glass if the insulation class is a combination class.