IAPMO IGC 237-2019涵盖规定工作压力为103 kPa（15 psi）或更高的高压屏蔽联轴器，用于无轮毂铸铁污水管和管件，并规定了材料、物理特性、性能测试和标记的要求。

IAPMO IGC 237-2019 covers high pressure shielded couplings which have a stated working pressure of 103 kPa (15 psi) or greater for use with hubless cast iron soil pipe and fittings and specifies requirements for materials, physical characteristics, performance testing, and markings.