Drip Pan Elbow Sizing

For safety valves with flanged outlets 2 to 4 use companion flange short nipple and drip pan elbow all same size as valve outlet.

Drip pan elbow sizing.

Drip pan elbows for use with safety relief valves shall be astm a126 cl b cast iron and be of the same size as the valve outlet or larger. Pressure drop is difference between inlet pressure and reduced pressure. Do not plug the drip pan elbow. For use with safety relief valves the drip pan elbow provides a self draining outlet to assure unrestricted discharge and keeps the safety valve from filling with water.

The drip pan elbow changes the outlet of the safety device from horizontal to vertical. Installation of the drip pan elbow has its own guidelines. 6 and 8 elbows have integral 125 ansi b16 1 flange. O never attach the vent discharge piping directly to the safety valve.

Use table as shown drain to waste 11 2 min make short as possible drain waste nom pipe size f nom pipe size a pipe size riser supported overhead g e d c b 60 60 40 60 40 40 30. Drip pan elbow shall be made of cast iron and conform to the power piping code. O the safety valve vent pipe may not touch the drip pan elbow o the. For safety valves with flanged outlets 2 inch to 4 inch use companion flange short nipple and drip pan elbow all same size as valve outlet.

Model 299 drip pan elbow the illustration shows a discharge elbow and drip pan unit attached to a safety valve with female npt outlet. Important length of discharge piping must be kept to a minimum. The drains on the drip pan elbows are designed to collect any condensed liquid and rain and allow flow safely away from the safety valve. Discharge elbow and drip pan unit attached to a safety valve with female npt outlet.

This would place undue stress and weight on the valve body. Drip pan elbows must be provided with a suitable unrestricted self draining source. For safety valves with flanged outlets 2 to 4 use companion flange short nipple and drip pan elbow all same size as valve outlet. Pipe as shown on the drawings.

A drip pan elbow is a specialty elbow fitting configured with a pan at the top that is used to collect and remove condensate in steam systems. 6 and 8 elbows have integral 125 lb. It shall have a pan to collect condensate in the steam riser pipe and a drain to pipe away the condensate. Installation the drip pan elbow is to be connected to the discharge connection of the safe ty relief valve by a short pipe nipple.

The length of discharge piping must be minimized. The discharge vent piping should be supported independently from the safety valve drip pan elbow assembly to prevent undue stresses on the safety valve. Flanged valves 4 and smaller will require. Touch the drip pan elbow.

Important length of discharge piping must be kept to a minimum. 6 and 8 inch elbows have integral 125 ansi b16 1 flange.