Material specifications

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Material specifications

Coupling body

Our NordicFlow® grooved couplings and fittings are made of ductile iron according to ASTM A536 65-45-12 and are available painted red (RAL3000) or galvanized (Dacromet). They are available in sizes from DN32-DN250 and withstand a working pressure of 20.7 bar.

Enexia also offers a range of stainless steel grooved parts in type CF8M (316) Stainless Steel per ASTM A351, A743 or A744 Gr. CF-8M.



Our EPDM gaskets are internationally certified and have undergone aging tests at 110°C over a period of 45 days (1080 hours) and cold tests at -40°C over a period of 4 days (96 hours). Operating temperature -34°C to 110°C. The gaskets must be lubricated with approved lubricant before installation

Recommended to be used with cold and hot water within the temperature range -34 °C to +110 °C. Can also be used with acid water, chlorinated water, DI-water, sea water, waste water, weak acids, oil-free air and several different chemicals. Not recommended to be used with oils, mineral oils, solvents or aromatic hydrocarbons.

Other gasket materials are available upon request, please contact us for more information.

Bolts and nuts

The bolts have an oval neck which fits in a matching oval hole in the coupling housing bolt and locks the bolt. Flange nuts provide a secure locking screw connection.

Both the nuts and bolts are made of medium carbon steel, threaded according BSPT, electro-galvanized and tempered.


Thin wall pipe

Our factory grooved NordicFlow® thin wall steel pipes are available in lengths of 3 m and 6 m. They are hot dip galvanized according to EN 10240, powder coated gray RAL7012 or untreated.


Read more about mechanical tees >


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