Cross fittings are also called 4-way fittings. If a branch line passes completely through a tee, the fitting becomes a cross. A cross has one inlet and three outlets, or vice versa. Cross fittings can generate a huge amount of stress on pipe as temperature changes, because they are at the center of four connection points. Dimension standard: ASME B16.9 & ASME B16.11 For sour service and H2S application we provide material confirms to NACE