... and pig manufacturer, and the configuration can be either symmetrical or asymmetrical. The Wye Fitting will pass commonly used pigs, ... : Standard (i.e. crude oil, natural gas, hydrocarbons, water or chemical injection, etc.) and Sour (i.e. hydrogen sulfide, carbon ... configuration- Butt-weld ends, butt-weld extension nipples, or flanged inlets and outlet- Specification for weld-neck flanges, if ...