Pump Static Head Difference

Continue from Pump Total Differential Head The static head difference across the pump is the difference in head between the discharge static head and the suction static head. Static head difference = discharge static head – suction static head Discharge Static Head The discharge static head is sum of the gas pressure at the surface of the liquid in the discharge vessel (expressed as head rather than pressure) and the difference in elevation between the outlet of the discharge pipe, and the center line of the pump. Discharge static head = Discharge vessel gas pressure head + elevation of discharge … Continue reading Pump Static Head Difference

Pump Total Differential Head

Pump System Diagram Flow Rate Usually, the flow rate of liquid a pump needs to deliver is determined by the process in which the pump is installed. This ultimately is defined by the mass and energy balance of the process. For instance the required flow rate of a pump feeding oil into a refinery distillation column will be determined by how much product the column is required to produce. Another example is the flow rate of a cooling water pump circulating water through a heat exchanger is defined by the amount of heat transfer required. Total Differential Head The total … Continue reading Pump Total Differential Head

Flange Face Finish Type

What’s the flange facing finish? The facing finish or face finish of a pipe flange manufactured in accordance with ASME B16.5 refers to the smoothness or roughness of the facing surface. In a bolted flange joint, the flange face is in direct contact with the gasket. As the bolting is tightened, the softer gasket material flows into the minor machining imperfections of the flange facing, resulting in a fluid-tight seal. If the flange facing is smooth, a smaller tightening stress exerted on the bolting may result in an impervious seal. If the flange has a rough face, the smaller stress … Continue reading Flange Face Finish Type

Flange Standards Summary EN, US

Flange standards A flange standard lays down the dimensions, surface finish, facing type, marking, material and technical specifications for flanges. National flange standards in Europe have largely been superseded by the European EN 1092 series. It comprises flanges with DIN origin and PN/DN designations (DN classification being dependent on PN). Various national standards bodies have incorporated this standard into their respective national standards: DIN EN 1092; BS EN 1092 und NF EN 1092. European standard EN 1092: Flanges and Their Joints (Circular Flanges for Pipes, Valves, Fittings and Accessories, PN designated) Part 1: Steel flanges, PN 2.5 to PN 400 Part … Continue reading Flange Standards Summary EN, US

PTFE vs Teflon

You also have concerns about PTFE vs Teflon when choosing a polymer for your products: What is the difference between the two? The only difference resides profoundly in the word. PTFE is the simpler shape of the polytetrafluoroethylene component and the common name for the same material is Teflon. Look no further than PTFE if you are looking for a highly versatile, non-stick material which is resistant to chemical, electrical and thermal stress. What is PTFE? Polytetrafluoroethylene is a synthetic material made up of two fundamental elements: carbon and fluorine to earn it its description in its entirety. This is … Continue reading PTFE vs Teflon

Why is the Gap needed on Socket Welds

The socket weld is a pipe attachment detail in which a pipe is inserted into a recessed area of a valve, fitting, or flange. The joint construction is a good choice wherever the benefits of high leakage integrity and great structural strength are important design considerations. Advantages of Socket Weld Pipe Fittings The socket weld pipe fittings can be used in place of threaded fittings, so the risk of leakage is much smaller. Socket weld pipe need not be beveled for weld preparation. The weld metal can not penetrate into the bore of the pipe. Construction costs are lower than with butt-welded joints due … Continue reading Why is the Gap needed on Socket Welds

Calibration of Welding Tools, Equipment with ISO 3834 requirement.

The manufacturer shall be responsible for the appropriate calibration or validation of measuring, inspection and testing equipment. All equipment used to assess the quality of the construction shall be suitably controlled and shall be calibrated or validated at specified intervals. … Continue reading Calibration of Welding Tools, Equipment with ISO 3834 requirement.