OR – oil-resistant plate, OR working: indoor air, tanks, vessels; inert gases at a pressure of 0.05 to 0.4 MPa or oil and fuel oil, gasoline at a pressure of 0.05 to 10.0 MPa; nitrogen. The plate has hardness: 40-55 units Shore – soft (M), 55-70 units. Shore – average (C), 70-90 units. Shore – elevated (T). TU U22.1-42171243-001: 2020.
