Manufacturer and designer of pressure pipe plugs to seal pipelines for maintenance or for pressure testing. sizes from 1/2" to 168" are common with pressure ratings to 5000 psig. Mechanical Design Corp can provide round oblong and square pipe plugs ,/bulkheads for your application. Pipe plug is considered an essential accessory that is not only used for sealing the pipe temporarily but also used to test pipe for its integrity. If you want to buy the pressure test plugs and foreign material exclusion plugs, choose Mechanical Design Corp as we deliver top quality items that are durable and can be reused several times .