8.109. Bolting materials for flanged connections installed on aboveground piping that is to contain petroleum products must be of alloy steel corresponding to Grade B-7 in ASTM A193/A193M, Standard Specification for Alloy-Steel and Stainless Steel Bolting for High Temperature or High Pressure Service and Other Special Purpose Applications, published by the American Society for Testing and Materials International.
Gaskets in flanged connections must be of a material resistant to the liquid contained in the piping and capable of withstanding temperatures of at least 650 °C without damage.
O.C. 220-2007, s. 1; O.C. 87-2018, s. 4111.