pipeline valve

pipeline valve

pipeline valves are designed with a body vent fitting in order to allow the maintenance technician to verify the sealing ability of the valve. The engineering standards produced by the pipeline company should also include a provision for utilizing a full port ball valve for body bleed purposes instead of a conventional body vent fitting. Many designs of body vent fittings utilize a very small vent passage.

The features of pipeline valve are: (1)NACE specification; (2)fire safe certified design; (3)ESDV service suitability; (4)cryogenic service suitability; (5)metal to metal seating in ball valves; (6)for high / low temperature and abrasive services. The valve shall be packaged for shipment with air-tight end closures to prevent shipping grease from leaking out and to prevent air, rain water, sea spray from entering the body of the valve. All body vent/drain valves shall be in the closed position. The pipeline purchasing department shall be responsible for advising the valve manufacturer of all written specifications prior to commencement of manufacturing. Written confirmation from the manufacturer regarding their ability to comply with the written specification must be received before the valve is placed on order.

The pipeline construction superintendent shall be responsible for ensuring all construction practices are fully documented and written procedures adhered to.The pipeline construction inspector shall be responsible for ensuring all construction codes and practices are adhered to. This provides a permanent record of every valve and can include such things as all name plate information for the valve and actuator, location information by physical site description or GPS coordinates, scanned images such as “as-built” drawings, valve seat leakage rates, atmospheric leakage verification and information regarding the valve site conditions.