1、Pipe preparation：Check pipe end for proper groove dimensions and to assure that pipe end is free of indentations and projections that would prevent sealing.

2、Lubricate gasket：Check gasket to be sure it's compatible for the intended service. Apply thin lubricant to the outside and sealing lips of the gasket

3、Gasket installation：Slip the gasket over one pipe, making sure the gasket lip does not over-hang the pipe end

4、Alignment：After aligning two pipe ends together, pull the gasket into position, centering between the grooves on each pipe. The gasket should not extend into the groove on either pipe.

5、Housing installation：Romove one bolt&nut and loosen the other nut. Place one housing over the gasket, making sure the housing keys fit into the pipe grooves. Swing the other housing over the gasket and into the grooves on both pipes. Re-insert the bolt and connect two housings.

6、Tighten nuts：Firstly hand tighten nuts and make sure oval neck bolt completely fits into bolt hole. Then securely tighten nuts alternatively and equally to the specified bolt torque by using spanner.