1.1 This specification covers the evaluating of the performance of heavy duty shielded couplings to join hubless cast iron soil pipe and fittings. 1.2 Couplings covered by this standard shall have minimum dimensions as fo This specification covers the performance evaluation of heavy duty shielded couplings to join hubless cast iron soil pipe and fittings. Physical properties of all stainless steel and gaskets shall comply with the specified values. Requirements for the