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Отводы крутоизогнутые (ст20) ГОСТ 17375-83 ст20 Настоящий стандарт распространяется на бесшовные приварные отводы из углеродистой и низколегированной стали типа 3D с R приблизительно = 1,5 DN и тета = 45°, тета = 60°, тета = 90° и тета = 180°, изготавливаемые из труб методами штамповки или протяжки по рогообразному сердечнику.

Forged Threaded Weld Fittings

Threaded Plugs and Bushings

Thread step and methods of stainless steel pipe fittings are as follows: The thread sets before the first choice corresponds to the diameter of the die, according to sequence number 4 will die to turn into the hinge plate die chamber. Prior to loading, pay attention to the hinge plate on the iron sweep. The pipe clamp is clamped firmly on the stainless steel pipe fittings, the stainless steel pipe fittings are in a horizontal state, and the pipe ends extend out of the pipe pressing pliers about 150mm. There shall be no attention orifice oval, oblique mouth, burr and flaring defects. 3 after the card claws sliding handle 9 release, the hinge plate is sheathed in the pipe, then turn the rear clamping claws sliding handle, hinge plate fixed on the end of stainless steel pipe fittings, die elastic handle 6 to the end, and the activities of the underlying disk 4 alignment fixed disc 2 with diameter corresponding to the scale, make them coincide with diameter, final tightening standard disc fixed handle 5. (4) operation, the first station at the end of the tube of front side, facing the pressure of pipe clamp, legs a splayed, hand pressed hinge plate, and force to move forward, the other hand holding the handle 7, according to a clockwise direction pulled the hinge plate until the hinge plate after wearing buckle pipe, then going sideways station in pressure pipe clamp side, a handle is wrenched. Manual stainless steel pipe fittings. Fifthly, began to thread sleeve, action should be slow, steady, operator attention to coordinate with each other, not overexert, so as not to set the thread and the stainless steel pipe fitting misalignment caused by eating buckle, partial deduction, to be set into the two buckle, for lubricating and cooling die, to continuously to the cutting position drops into the lubricating oil. The set of process in depth should not be too deep, set end again, adjust a subscript disk, increase the amount of feed, and then set it again. General requirements: nun DN25 within the stainless steel pipe fittings, can be a set of screw: DN25 ~ DN40mm of stainless steel pipe fittings, should be set into the two times; DN50nuin more than the stainless steel pipe fittings, to be pided into 3 sets of the system. Seventhly, the handle is wrenched, the best is operated by two people, action to coordinate, so that not only the operation is labor-saving and avoid defects of the generating set of the thread and the stainless steel pipe fitting are not concentric. Set DN 15 ~ DN20n. Stainless steel pipe fittings, a can be wrenching 90 sets of slightly larger diameter pipe thread, a wrenching 60 degrees, set of DN50nuii or above DN50nuii stainless steel pipe fittings, depending on the actual need to increase manpower, but also to increase the number of pull. And eighthly, when processing thread to close to the specified length, side pulled the handle 7, one side should be slowly loosen die elastic handle 6, and release side edge of a 2 – 3 deduction, to make thread the end of a set of a taper. To set the thread exit end hinge plate, the hinge plate shall not reverse back, so as not to damage the die and thread or cause arbitrary deduction. The threaded sleeve is good, with connections to try, with 2 to 3 hand can be screwed into the buckle. Such as that of the screw loose, connected after the poor tightness and thread quickly by medium corrosion of stainless steel pipe fittings; as of the thread tight, connection, easy to burst pipes, or because most of the pipe thread dew in outside of the pipe, and reduce the coupling strength. The requirements of high tightness under the condition of gradually available method of releasing die elastic handle, increase the thread taper. Electric) set of filaments, “short silk” and “crooked wire,, filament, generally used for radiator and the stainless steel pipe fitting pipe connected, at one end of the short thread, at the other end of the short thread 2.5 to 3 times the long thread, do not need to any taper. Stainless steel pipe screwed into the plate clamping wire “short silk head”, also known as Lady Gaga, is refers to the length of less than 100mm, at both ends of the threaded tube, so short to the tube clamp pressure, is not by the hinge sleeve thread: this can be the first in a long stainless steel pipe fittings of a short thread, then according to the length of the section is a short thread pipe head, and the threaded end is connected with a pipe hoop stainless steel pipe, and then connected with a pipe hoop stainless steel pipe is fixed on the bench, so that you can in a short tube at the other end of a thread: finally, the both ends of a thread tube removed, “short silk head” set of finished. In installation of stainless steel pipe fittings, when the branch for slope, and in case of connection thread is not correct, sets of threads corresponding skew, commonly known as “twisted wire. Crooked wire the maximum not more than 15 DEG crooked wire “set of method is: hinge plate set into the one, two button, the card claw handle according to the need of skewness slightly loosen the standard disc to the side of the inclined cutting can be.

ASTM A53 GR.B seamless pipe can be used for manufacturing circularcomponents like drill rod,transmission shaft and bicycle frame,which can save on raw materials,and reduce processing time,when comparing to use solid steel.It is manufactured strictly according to ISO9001 quality management system,and is in accordance with ASTM A53 Grade B.Thus,you can feel comfortable in choosing our products. Our seamless pipe is in accordance with a wide range of standards,like ASME B16.9,ISO,API,EN,DIN BS,JIS,and GB,etc.They feature high strength,good toughness,and high resistance to corrosion,and are widely used in many industries,such as petroleum,power generation,natural gas,food,pharmaceutical,chemicals,shipbuilding,papermaking,and metallurgy,and so on. Size  Seamless Pipe: 1/2” ～24”, DN15～DN600 OD21.3MM～609.6MM Weleded Pipe 1/2” ～48”, DN15～DN1200 OD21.3MM～1219.2MM Industrial Processes hot rolled,hot expanded,cold drawn,and hot galvanized. Standard: ANSI B16.9 / 16.28, ASTM A53/A106, API 5L, ASME B36.10M—1996, DIN2605 / 2615 / 2616, JIS P2311/2312 Thickness: SGP, STD, SCH40, SCH80, SCH160. XS,XXS and so on. Size: 1/2″–24″ Material: ASTM A106,A53GRB Surface treatment: Transparent oil, rust-proof black oil or hot galvanized.

At all levels of micro-irrigation system, determine the diameter of the stainless steel pipe fittings and pipe section is one of the main task of the hydraulic calculation. Micro-irrigation system of capillary only 10 mm in diameter, and 12 mm, 15 mm, 20 mm, 25 mm to wait for a few kinds, in can choose directly based on the experience in the design of micro-irrigation system. Stem, the diameter of the pipe section should be calculated according to by the flow section O flow relations with stainless steel pipe section size is: The flow velocity is related to only one flow is not sure of the diameter of the. Therefore, in the design of micro-irrigation stainless steel pipe system, the velocity of choice is one of the important problems of stainless steel pipe fittings design. Stainless steel pipe fittings mainly affects two aspects, the design of the velocity is one if the velocity is too large, water and wear resistance of stainless steel pipe head loss is big, in the process of operation will increase energy consumption. If the velocity is very large, in the open and closed the gate and all of a sudden stop of pipeline system is easy to occur pipeline water hammer, direct damage caused by water hammer pressure on pipes. In order to prevent the pipe network middle damage caused by water hammer, the velocity of the maximum limit has certain limits. Second, if the flow rate is too low, in order to deliver a certain flow of water, you need a larger water section size stainless steel pipe fittings, pipe network construction investment increase, so the stainless steel pipe fittings and not too small. Only from the aspects of technology, the maximum and minimum value of the velocity of change between the range is very big, but the pipe diameter determination involves the two aspects of technology and economy, therefore, also should consider from the economy of stainless steel pipe fittings design flow rate.

D 150 mm stainless steel pipe fittings or less, because the stainless steel pipe bending without heating, the stainless steel tube bending aluminum pipe and copper pipe, cold bending heat is more appropriate. Stainless steel pipe fittings’ cold bending processing, tube don’t need to pack sand (except for larger diameter and wall thinner), usually conducted on manual or motorized pipe bender. When the stainless steel pipe outside diameter greater than 60 mm must be placed in the tube bending mandrel bending. Outside the mandrel margin is smaller than stainless steel pipe diameter 1 ~ l. 5 mm, on stainless steel pipe fittings began to bend and slightly forward. Ball part of the heart library boundary with cylindrical part should always keep in the beginning of the stainless steel pipe fitting curved surface. If the mandrel stretched out before, is likely to make the mandrel fracturing; Without mandrel to position, and stainless steel pipe fittings causes excessive ovality. A large number of bent pipe, use the motor tube bending machine. Stainless steel pipe fittings is one of the books to parts of piping, it originated in the connection between tube and tube and the turning of pipe, branch, variable diameter, or closed, and then the pipe installation and maintenance (such as union).

A reducer is the component in a pipeline that reduces the pipe size from a larger to a smaller bore (innerdiameter). The length of the reduction is usually equal to the average of the larger and smaller pipe diameters. There are two main types of reducer: concentric and eccentric reducers. A reducer can be used either as nozzle or as diffuser depending on the mach number of the flow. A reducer allows for a change in pipe size to meet hydraulic flow requirements of the system, or to adapt to existing piping of a different size. Reducers are usually concentric but eccentric reducers are used when required to maintain the same top-or bottom-of-pipe level. These fittings are manufactured in inch and metric size. Concentric Reducer Concentric Reducers are used to join pipe or tube sections on the same axis. They provide an in-line conical transition between pressurized pipes of differing diameters. A pipe reducer can be a single diameter change or a multiple diameter change. The pipes cannot recognize what the outside configuration of the pipe reducer looks like. The pipe flow is affected by the inside diameter conical transition configuration which can be axially moved and externally reconfigured to provide for more economical reducer fittings. Thus, concentric reducers connect pipes of unequal size but have a common centerline. In other words, it is a type of pipe fitting with different size ends to join pipes of different diameter that joins pipe sections on the same axis. Concentric reducers are designed with the small and large diameters on opposite ends and joined by a cone shaped transition section. They are available in both seamless and welded construction. How to take measurements of concentric reducers? Get the measurements of outer diameter (OD) and inner diameter (ID) , height (H), and the total dimension (T1, T2). Uses of concentric reducers: Some uses of concentric reducers are as follows: Concentric reducers will transition gracefully between the piping and the pump. The concentric reducers help in transporting slurries or abrasive liquids. They are useful in services where cavitation is present. When transporting between flanges or pipes of different ratings and wear protection is necessary, concentric reducers are ideal. Concentric reducers are used in discharge of the pump. Eccentric Reducer An eccentric pipe reducer fitting is manufactured with the smaller outlet off center to the larger end, which allows it to align with only one side of the inlet. The reducer must be installed with straight side up so that it can prevent trapping air at the pump suction. The eccentric pipe reducers allow simple connection of different sized pipes. Uses of eccentric reducers: Keeping big pipes and small pipes together. Reducing noise and vibration at the same time. Requires less installation space. Absorbs pipe wall and fluid borne noise. Less turbulence or material entrapment. Eccentric reducer are used with flat side up in pump suction to avoid cavitation.

Pipe Tee is a type of pipe fitting which is T-shaped having two outlets, at 90° to the connection to the main line. It is a short piece of pipe with a lateral outlet. Pipe Tee is used to connect pipelines with a pipe at a right angle with the line. Pipe Tees are widely used as pipe fittings. They are made of various materials and available in various sizes and finishes. Types of pipe tees: Reducing tee Reducing tee is a type of pipe fitting in which the branch port size is smaller than the ports of the run. This type of pipe fitting can also consider size reduction from one of the run ports to the other. For different applications in various industries, the reducing tees are available in many various combinations of sizes and configurations. Apart from the standard sizes, other unusual combinations of size can also be attained using component parts of tees, reducing tee and reducers. Equal tee (or straight tee) The primary purpose of a Tee is to make a 90° branch from the main run of pipe. Standard there are 2 possibilities, on behalf of the equal tee and reducing tee. The equal tee (or straight tee) is used as the branch has the same diameter as the run-pipe. The reducing tee is used as the branch has a smaller diameter as the run-pipe. Male & Female Branch Tee The basic difference between the male and female branch tee is that while the male branch tee connect to a female NPT thread, the Female Branch tee connects fractional tubes to male NPT threads. These type of fittings come in inch and metric size tubing and are widely used in a number of industries. Finishes on Pipe Tees: Pipe Tees are available in various finishes. Some common finishes are like: •Galvanized finish •Nickel plated •Black cast •White coating •Gold finish •Electroplated etc. Features of Pipe Tees: •There are three female openings in a T shaped pipe tee. •There are straight pipe tees which have the same size openings. •Reducing pipe tees have one opening of different size and two openings of the same size. •There are sanitary pipe tees which are used in waste lines. These kind of pipe tees have a curved branch which is designed for a clean out plug. They are used to prevent obstruction of waste. •A cross pipe tee has four equal sized female openings. •A wing pipe tee has lugs to fasten the fitting to a wall or stud. •A compression pipe tee uses compression fittings on two or more ends. •A test pipe tee has a threaded opening. This opening is used in conjunction with a threaded plug for a clean-out opening on a drain pipe. Applications of pipe tees: Pipe Tees are widely used in various commercial and industrial applications. Industrial applications include: •Chemical processing •Petroleum •Pulp/paper •Refining •Textile •Waste treatment •Marine •Utilities/power generation •Industrial equipment •Automotive •Gas compression and distribution industries

Stainless steel pipe fittings in heating condition, to bend called hot bending. The bending of the stainless steel pipe fittings and can be pided into sand filling without buckling of hot bending and buckling is not filling sand hot bending. Without buckling filling sand hot bending under applicable to D400mm stainless steel pipe fittings, the bending radius R > 3.5 D,. Its main operations include line filling sand heating, cooling and heat treatment, etc. (1) stainless steel pipe’s line pipe crossing is usually marked with white chalk or white paint mark. L, when a is in the bend, the fixed with two block string (bolt) ask, D, < l50mm stainless steel pipe fittings, L1 should be not less than 500 mm, D > l50mm stainless steel pipe fittings, L1 should be not less than 600 mm, L the length of the stainless steel pipe fittings heating bending part. (2) the sand filling,  tube filling sand within the purpose is to prevent the stainless steel pipe fittings elliptic or buckling when bending. At the same time, in the sand heating can save big when the quantity of heat, can extend the time of bend pipe. Sand should be clean screen and drying, to particle size also to have certain requirements. Before filling sand, stainless steel pipe fittings at one end of the plug with length to diameter 1.2 ~ 2 times. About 25 of taper conical dry wood heart can also use the steel seal or use the steel plate welding seal), and then sucked straight stainless steel pipe fittings, with one end of the cork on the ground, with a special filling sand and sand filling equipment or manual with funnel will move into the tube. Each pack sand filling height 300 ~ 400 mm, with iron bars or vibrators outside the tube walls of beat vibration, the packed sand strong. After filling sand, in the top of the stainless steel pipe fittings to also want to break into a cork, and cork must come into contact with the tube of the sand. (3) stainless steel pipe fittings of commonly used heating pipe, heating furnace, heating gu, used for carbon SuoGang with coke or anthracite, the brass and alloy steel pipe, appropriate USES charcoal for aluminum tube with coke. Bituminous coal tender material it is forbidden to use it, for the bituminous coal contain harmful impurities such as sulfur, phosphorus, heating will penetrate into pipe fittings surface of metal in the organization, and make the pipes become fragile. Heating pipe, should be assorted child need ah song over the toe in the flame of uniform, do not turn the pipe when heated evenly. Depending on the types of pipes and heating temperature, the carbon steel pipe is 950 ~ 1000 ℃ (i.e., to pink or orange), of low alloy steel pipe is 1050 ℃, the nickel and chromium stainless steel tube is 1100 ~ 200 ℃, the copper pipe is 400 ~ 500 ℃, the aluminium tube is 300 ~ 400 ℃ when the stainless steel pipe fittings and the sand are all reach the heating temperature, should immediately remove the pipe bending. (4) Platform has two kinds of concrete and cast iron. Fixed platform soil has a steel bolt, sample or model. Better stainless steel pipe fittings of heating on the platform quickly, end between steel bolt, the other end is in 3 ~ 5 seven hand dumpling or electric car hinge for wire rope tied bent stainless steel pipe fittings, smooth stretch bending speed should be uniform. Tended to be slightly stainless steel pipe fittings for cooling after bending springback straightened (3 ~ 5 °), so when bend bend more than sample 3 ~ 5 °, or taken into account when making sample. (5) the cooling of the stainless steel pipe fittings and desanding tube bending, buried in the hot sand or asbestos dust, best to make it slow cooling. After being the pipe cooling, will empty tube sand, remove residual burning in the sand, with compressed air blowing off again, finally check its curved shape and any other defects. (6) stainless steel pipe fittings after heat treatment of carbon steel pipe bending generally don’t need to heat treatment, but for the higher working pressure pipe bending best annealing treatment, in order to eliminate the internal stress generated when the bend. Annealing method is generally around the bend heated to 600 ℃, slow cooling in the air again can. For alloy steel tube, should for normalizing and tempering treatment, in order to improve the microstructure and stress relief.

What are pipe clamps? Pipe clamps usually have one fixed pad, and one adjustable pad. Pipe clamps are constructed using various materials and are available in several configurations with a variety of finishes. Metallic pipe clamps have high impact resistance and various finishes like a brilliant, glossy finish, heat-resistant coatings and epoxy coatings or plain look or hot-dip galvanized or painted. Various types of pipe clamps are as follows: •Rigid Clamps •U-Bolt Clamps •Flat Cushion Clamps •Oval Clamps •U-Bolt with Cushion Clamps •P Style Clamps •Swivel Bolt Clamps How to measure pipe clamps? Take the measurements of the following: •Diameter •Outside diameter of pipe •Cap nut diameter •Load ability Features of Pipe Clamps: Common features of pipe clamps are as follows: •Simple to operate •Easy to install •Adjustable in small range •Good appearance •Temperature range is dependent on the clamp lining being used. •All pipe clamps are designed to have a very high impact resistance. •Make for quick, easy pipe installation and layout. •Shock-absorption •Vibration dampening •Noise reducing property •Heavy torque •Usually used for large diameter pipes etc. Mounting Guidelines of pipe clamps: •The clamp should be mounted directly after the threaded connection or coupling of the piping which in turn protects the connection from vibrations. •Bends in the line should be clamped on both sides of the pipe bend. •The pipe line should be clamped directly before and after any in-line valves. •Proper Torquing of the clamp bolts is very essential. Uses of pipe clamps: Some uses of pipe clamps are as follows: •Used for fastening and fixing various pipelines whether in construction or industries or buildings etc. •Provide fast, safe, economic service and installation in piping system. •Pipe clamps are designed for a wide range of fastening applications. •These clamps are ideal for suspension of cold or hot pipe lines with heavy load having little or no insulation. •They are also used for high and even tightening force around the pipe, minimizes leakage. •The pipe clamps absorb shock, dampen vibration, and reduce noise in plumbing systems. •They can be used in high temperature applications. Applications of pipe clamps: Pipe clamps are used in general industrial pipe construction, in all areas of residential, industrial, mobile and marine hydraulics, the field of press technology, instrumentation and control technology, and many other application fields.

The application range of the stainless steel reducer: A, mine, the application of the coal industry (1) mine: mining, ore concentrate and tailings filling transported to tube wear serious, using kuangfen pipelines such as panzhihua, daye mine service life is less than a year, to increase the tube can make the life. (2) coal: coal preparation and long distance pipeline of wet method widely used coal conveying, requires the duct is wear resistant and corrosion resistant, using the tube can be used as a long duct, considerable economic benefit. The application of the two, metallurgy, electric power industry Conveying of pulverized coal, metallurgy, electric power industry ash, mud and lime gypsum slurry every year to spend a lot of metal pipe. By using ceramic pipe to replace other pipe has high wear resistance, long service life, easy installation, the economic benefit is remarkable characteristic. The concentric reducer arc length calculation method Launches the arc length calculation methods of stainless steel concentric reducer topic related data in combination with our company for stainless steel reducer (stainless steel eccentric reducer, stainless steel concentric reducer, size of the stainless steel reducer), arc length calculation method of stainless steel concentric reducer carried out by the subject has its own unique insights, here are our views on the subject of his own point, the hope can help you. Stainless steel concentric reducer, a big head radius for R1, capitulum radius R2, high for H, these three data on the sheet metal drawing is known. For the convenience of calculation, a big circular arc radius for RD, an Angle for alpha, small head of the radius of the circular arc for RX, (R1, R2) = Δ (R), L size for the length of the lateral projection. (RD – RX) = L = [(H) ^ 2 + (Δ R ^ 2) ^ (0.5) RD = (R1 * L) present Δ (R), RX = (R2 * L) present Δ (R), An Angle for alpha = [180 x (Δ R)] present (L (PI), unit is degree.