Piping is an assembly of pipe, pipe fittings, valves, instruments and specialty components. Piping is divided into three major categories: Large bore pipe generally includes piping which is greater than two inches in diameter. Small bore pipe generally includes piping which is two inches and smaller in diameter. Tubing is supplied in sizes up to four inches in […]
When a fluid is required to be transferred from one location to other, pipe is required. A pipe is considered as a pressure tight cylinder which is used to convey fluids under pressure through materials of commercially available designation. A pipe is a tubular section or hollow cylinder, usually but not necessarily of circular cross-section, […]
What is the main use of ASTM A53 & A106 Gr.B pipes? Answer: ASTM A53 pipes are mainly used for utility services whereas A106 Gr.B pipes are used for high Pressure & high temperature services.
Where the ERW & Seamless pipes are used? Answer: in general above 18” ERW pipes are used. Below 18” seamless pipes are used. Seamless pipes can sustain higher temperature & pressure.
From which size onwards NB of pipe is equal to OD of Pipe? Answer: From the size 14” and onwards NB = OD of pipe.
What is the difference between Pipe and Tube? Answer: Pipe is identified by Nominal Bore and thickness is defined by Schedule whereas Tube is identified by OD & its thickness as BWG (Brimingham wire gauge or 1/100 inch). Pipe is used for MASS TRANSFER Tube in general used for HEAT & MASS TRANSFER Pipe is […]
Which type of piping materials are used for drinking water, instrument air etc? Answer: Galvanized steel materials shall be used for drinking water, utility instrument air and Nitrogen lines (Low Pressure).
From which side of pipe will you take a branch connection? Answer: When fluid is Gas, Air or Steam and Cryogenic Service – Topside. When Fluid is Liquid – Bottom Side. steam is also sometimes taken from side to avoid dual phase flow of moist steam and dry steam
What do you mean by Jacketed Piping? Answer: Piping where the most uniform application of heat/temperature is required to the process, where steam tracing is not capable of maintaining the temperature of fluid constantly.Usually used for molten sulphur, Polymers service etc.
What is the minimum distance to be maintained between two welds in a pipe? Answer: The thumb rule is that the minimum distance between adjacent butt welds is 1D. If not, it is never closer than 1-1/2 inch. This is supposedly to prevent the overlap of HAZs. Minimum spacing of circumferential welds between centerlines shall […]