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Machinability test of metal

Metal bending test Metal bending test is a test that the bending center of the specified size is used to bend the specimen to the specified degree, and to test the metal’s ability to withstand bending plastic deformation and show its defects. Metal bending tests can be performed at room temperature (cold bending test) or hot state (hot bending test). The size and shape of the specimen shall be determined according to the type of metal material according to the relevant standards. Bending test can be carried out on press, special testing machine, universal testing machine or round mouth vice […]

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How to design flange?

Brief introduction of flange Pipe flange, gasket and fastener are called flange joint. Flange joint is widely used in chemical engineering design, involving a wide range of parts. It is not only an essential part of piping design, pipe fitting and valve, but also an essential component of equipment, equipment parts such as manhole, sight glass, liquid level gauge, etc. In addition, flange joints are often used in other specialties, such as industrial furnace, thermal engineering, water supply and drainage, heating and ventilation, automatic control, etc. How to design flange? Standard system of pipe flange: There are mainly two systems […]

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How to remove rusted bearings, bolts and screws? These five tips will get you ……

This paper summarizes the causes of bearing rust and five methods to remove the rusty bearing. It not only cures the symptoms, but also cures the root cause. Finally, it also shares 3 tips to help the bearing to bid farewell to the trouble of rust. Let’s see if these little knowledge can be used in your daily work. When the bearing is seriously rusted, it is difficult to use a wrench to screw it down. Therefore, the workers will use various methods, such as knocking, dripping, burning, punching, welding, bubbling, etc. Many masters use a hammer to do it, […]

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What is thread

What is thread? In machining, the thread is cut on a cylindrical shaft (or inner hole surface) with a cutter or grinding wheel. When the workpiece rotates, the cutter moves a certain distance along the axial direction of the workpiece, and the trace cut by the cutter on the workpiece is the thread. The thread formed on the outer circular surface is called external thread. The thread formed on the inner hole surface is called internal thread. The basis of the thread is the circular shaft surface Generally, if the cross section of the thread is triangle, it is called […]

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How to compile technical specifications for valve procurement?

It is a common phenomenon in the current market economy environment to only specify the specifications, materials, structure descriptions, dimensions, and models to meet the procurement requirements when ordering valves. However, this approach is wrong, because a simple valve model, so Only a small part of the technical requirements covered, and this part of the requirements covered can not be completely reflected in the model, so it is easy to cause asymmetric information between the supply and demand of the valve, delay the normal installation and use time or after installation. Major accident. Therefore, it is very necessary to compile […]

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The standard and application of stainless steel seamless pipe and welded pipe

Stainless steel seamless pipe is a hollow cross-section and the surrounding no seam of the long stainless steel pipe. Stainless steel welded pipe is made of stainless steel plate or strip by crimping and then made of a steel pipe. Here to introduce the two under the standard steel.   The standard of stainless steel seamless pipe   Since the characteristics of seamless steel hollow section, a large number of pipes are used as the transport fluid, such as transportation of oil, gas, coal gas, water and some solid materials, pipes and the like. Stainless steel seamless pipe compared to […]

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The Differences between Socket Welding and Butt Welding

Socket Weld (SW) fittings A socket weld fittings involves two different sized pieces of pipe. The smaller one is inside the larger pipe. The  weld is completely around the outside circumference of the larger pipe. Butt weld (BW) fittings A butt weld fittings is two pieces of materials butted against each other and welded. Several different methods  exist for beveling the two pieces for good weld penetration. Both flat stock and pipe or tubing can be  butt welded. Generally, the weld is ground flush with the material surface. Price Normally, the price of Socket weld fittings is higher than Butt weld fittings in similar size. But the extra cost of butt weld […]

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Stainless steel pipe bend

Process characteristics of stainless steel pipe bend   If the processing technology of stainless steel pipe is not handled properly, it is possible to relax and damage the metal structure. This kind of damage is a kind of fine grain boundary crack, which will affect the mechanical properties and service life of the tube to a certain extent. The heating range of stainless steel pipe bend’s pipe is very small, and the temperature inside and outside the pipe wall is also different. Chromium is the most basic element of stainless steel stamping pipe bend. When the chromium content in stainless […]

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What are the processing methods of the tube sheet

The tube sheet is refers to in the circular steel plate to drill the hole which is slightly bigger than the outer diameter of the pipe, passes through the tube to weld the fixed one kind of fitting. Tube plate for tubular heat exchanger, boiler, pressure vessel, steam turbine, large central air-conditioning industry. The material of the tube plate will be selected according to the bad environment. The detection of the tube sheet includes the hole position, the aperture tolerance, the inner hole finish, the burr, etc.. For three or four kinds of pressure container tube sheet need high accuracy, […]

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Dimensions of Pipe Fittings

ASME/ ANSI STANDARD Dimensions of ASME B16.9 butt welding elbow Dimensions-of-ASME-B16-9-Concentric-Eccentric-Reducers Dimensions-of-butt-welding-180-degree-elbow Dimensions-of-butt-welding-straight-tee Tolerance-of-ASME-B16-9-butt-welding-fittings Wall-Thickness-and-unit-weight-of-ASME-B36-19M-stainless-steel-pipe Dimensions-of-ASME-B16.9-lap-joint-stub-end Dimensions-of-ASME-B16-9-short-radius-elbows Wall-Thickness-and-unit-weight-of-ASME-B36-10M-welded-and-seamless-wrought-steel-pipe Dimensions-of-ASME-B16-9-butt-welding-reducing-tee EN STANDARD Dimensions-of-EN-10253-2-butt-welding-elbows-2D Dimensions-of-EN-10253-2-butt-welding-elbows-3D Dimensions-of-EN-10253-2-butt-welding-elbows-5D Dimensions-of-en-10253-2-butt-welding-equal-tee Dimensions-of-EN-10253-2-butt-welding-reducer Dimensions-of-EN-10253-2-butt-welding-reducing-tee Dimensions-of-EN-10253-2-butt-welding-cap Dimensions-of-en-10241-threaded-pipe-coupling-socket Dimensions-of-en-10241-threaded-pipe-nipple DIN STANDARD Dimensions-of-DIN2982-BS1387-threaded-pipe-nipples Dimensions-of-DIN2986-threaded-pipe-coupling-socket JIS STANDARD Dimensions-of-JIS-B2311-B2312-SGP-ELBOWS Dimensions-of-JIS-B2311-B2312-SGP-TEES Dimensions-of-JIS-B2311-B2312-SGP-REDUCERS Dimensions-of-JIS-B2311-B2312-SGP-CAPS

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