NORSOK standard M-001 Edition 5, September 2014
5.7.4 Other utility systems
ISO 21457, subclause 7.4.4 applies with the following additional requirement:
Material selection for utility systems shall be in accordance with Table 6.
Table 6 – Materials for utility use
Service Equipment Materials Notes
GRP, type 22Cr duplex SS, Type 316 SS,
Fresh and potable water Piping and vessels
Copper base alloys.
1
Open drain Piping and vessels Type 25Cr duplex SS, GRP/FRP
Type 22Cr duplex SS, type 25Cr duplex SS,
Closed drain Piping and vessels
GRP/FRP
Sewage Piping Type 316 SS, type 22Cr duplex SS, GRP/FRP. 2
Provided by Standard Online AS for Mariano+Iannuzzi+/+GE+Oil+and+Gas 2014-10-20
Jet fuel Piping Type 22Cr duplex SS
Piping Type 22Cr duplex SS
Dry fuel gas and diesel
Tanks and vessels Type 316 SS, type 22Cr duplex SS, carbon steel 3
Instrument air Piping and vessels Type 316 SS, type 22Cr duplex SS. 4
HVAC controlled environment: type 316 SS
Tubing 5
Instrumentation Marine: Type 6Mo SS, type 25Cr duplex SS
Cable trays Type 316 SS, aluminium, carbon steel HDG 6
Dry CO2 systems Carbon steel, CRA
Fire-fighting systems Deluge system See table 4
AFFF piping Type 316 SS, type 22Cr duplex SS, FRP/GRP
Freshwater / plant air /
nitrogen
Piping, vessels and tanks Type 316 SS, type 22Cr duplex SS, PEX 10
Lubrication and seal oil Piping, vessels and tanks Type 316 SS, type 22Cr duplex SS 5, 10
Hydraulic fluid Piping and tanks Type 316 SS, type 22Cr duplex SS. 10
Glycol Piping, vessels and tanks Type 316, type 22Cr duplex SS 10
Methanol Piping, vessels and tanks Type 316, type 22Cr duplex SS 10
Carbon steel, type 22Cr duplex SS, CRA in heat 7, 8,
Heating/cooling media Piping and vessels
exchangers 11
Ventilation/air intake
ducts
Type 316 SS, LDSS, Al alloys, carbon steel HDG 6
HVAC
Air handling units Type 316 SS, LDSS, Al alloys
Seawater coils Titanium.
Miscellaneous chemical FRP/GRP, type 316 SS, type 22Cr duplex SS,
Piping and tanks 9
injection systems titanium grade 2
Notes
1. Large diameter piping and tanks can be made in internally coated carbon steel.
Tanks not intended for potable water, shall in addition be cathodically protected. The national health authorities shall accept
GRP, polypropylene and coating used for potable water tanks.
2. type 22Cr duplex SS for outdoor application
3. Diesel tanks in carbon steel should have a 3 mm corrosion allowance in the bottom section. In addition, the bottom and roof
should be coated. Cathodic protection should be used only if corrosion products from the sacrificial anodes do not cause
damage to the down-stream equipment. The same applies for use of Zn primers. No corrosion allowance is required for
cathodically protected surfaces. Consider coating the entire diesel tank if corrosion products can be detrimental when stored
product is utilized.
4. Type 316 SS is acceptable up to operating temperature 70°C provided located indoor in fully HVAC controlled environment and
un-insulated.
5. In marine atmosphere there may be a high risk for localized corrosion of type 316 SS, in particular crevice corrosion under
clamps. The use of alternative tubing material should be evaluated.
6. Hot dip galvanised carbon steel in fully HVAC controlled areas only.
7. Fresh-water heating and cooling media are normally treated with a corrosion inhibitor and an oxygen scavenger. In a freezing
environment, it is normally mixed with TEG.
8. Requirements on internal cleanliness shall be considered when choosing materials for systems containing filters, nozzles and
compact heat exchangers.
9. The combination of chemical and material should be considered in each case. Titanium grade 2, GRP or chlorinated polyvinyl
chloride should be used for hypochlorite systems.
10. Lean duplex SS (LDSS) may be applicable for tanks, not for piping and pressure vessels
11. Plates in plate heat exchangers shall be made in titanium grade 1, alternatively in alloy 276 or C22
NORSOK © 2014 Page 18 of 28
