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The most common way to connect large diameter spiral steel pipe is to weld, but in some projects, it is often used in the form of screw connection, flange connection, socket connection and groove connection. Connection mode Connection features Welding, flange connection belongs to l spiral steel pipe traditional pipe connection, in safety, sealing performance, cost of space, the repair efficiency has far cannot satisfy the market demand Scope of application Water pipe connection Oil, natural gas pipeline connection Chemical pipe connection Electricity pipe connection Connection mode Groove pipe connection technology is also called the clamp connection technology, has become the current first technology of liquid, gas pipeline connections, although the technology in domestic development time later than abroad, but because of its advanced technology, was received by the domestic market soon. The application of the grooved pipe connection technology, make complex pipe connection process becomes simple, fast and convenient. The pipeline connection technology major strides forward. Groove connection pipe fittings include two categories of products: (1) connecting sealing effect of pipe fittings with rigid joints, flexible joints, mechanical tee and the groove of the flange; (2) connect the transition role of pipe elbow, tee, four-way, reducer, and blind plate, spiral welded pipe, etc. Connecting sealing effect of groove connection pipe fittings mainly has three parts: the sealing rubber ring and clamp and locking bolt. Is located in the inner lining of the rubber seal on the outer edge of the connected pipes, and in conformity with the advance of rolled groove, and buckle on the outside of the rubber ring clamp, then with two bolts. Due to the rubber sealing ring and clamp adopting special seal structure design, make the groove fittings with good sealing, and with the increasing of inner fluid pressure, the sealing enhanced accordingly. Groove connection makes the pipe connection operation is simple, is advantageous to the construction safety, the system has good stability, easy maintenance, save work time, so has the good economic efficiency. The clamp connection, although the clamp single accessories price is higher, but the whole pipeline installation of comprehensive benefit is higher than the flange connection. Suitable for liquid, gas pipe connection Connection mode Connection features Coupling connection as an advanced way of pipe connection, which can be set can also be buried Ming, the joint rigidity, also has a flexible joint. Therefore has wide scope of application. Scope of application Points: according to the system can be used for fire water system, air conditioning hot and cold water system, water supply system, petroleum and chemical piping systems, thermoelectric and military industry pipeline system and sewage pipe system, etc. According to the points of piping material: can be used to connect steel pipe, steel pipe, stainless steel pipe, plastic pipe, ductile iron pipe, plastic pipe and steel pipe with thick wall joints and flange joint soft valve. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

In recent years, the worldwide high-end seamless steel pipe market recovery and the country’s economic strength gradually increased, the hot extrusion production process of seamless steel pipe ushered in a new round of development opportunities. Hot extruded steel pipe production process using hot extrusion method with three-stress deformation in the metal density is good, homogeneous, suitable for almost all varieties of steel production, particularly in the high-alloy steels difficult to deformation and various special-shaped production of the tube section has a special processing advantages. Hot extruded steel products because it has a performance advantage in the military, nuclear power, thermal power, aviation, mining, oil and petrochemical, and other key areas of the national economy and the high-end irreplaceable application prospects. Efforts to develop high-performance, high-tech and high value-added hot extruded steel pipe products, high-end steel pipe technology to promote national development and strengthening of comprehensive economic strength has far-reaching significance. Depending on technical requirements for products, hot extruded steel pipe after production using continuous production process, but also through rolling, straightening, shot blasting, degreasing, pickling processes to deal with. And the need to set up a multi-level defect detection, complete finishing facilities, the use of computer control and management, in order to ultimately effectively ensure a variety of products to meet the process requirements and the absolute strict product quality standards. Hot extrusion process meets stringent product standards, widely used in military, nuclear power, petrochemical, and other cutting-edge areas of aviation and a variety of stainless steel tubes, high-quality high-temperature corrosion steel pipe, steel pipe and other steel titanium and titanium alloy products. These high-quality, high-precision, difficult deformation of specialty steel products, its production processes often require special smelting, casting, rolling, forging production and R & D capabilities, and includes cold rolling, heat treatment process including a series of tube processing capacity. Core areas of hot piercing and hot extrusion production process need to build a complete production line, a broad product line includes: pretreatment tube offline, online pre-heating and heating tube, inner tube, the outer surface of the glass powder lubrication after heat perforation / reaming, after reheating and the inner and outer surfaces of the glass powder lubricant into the hot extrusion process and thermal pressure I saw after cutting, hot extruded steel tube (long tube by heat Sawing online after) by a roller transported to the background, and then heat quenched or cooled in the cooling bed.

First, the inner surface defects 1 internal fold Features: in the inner surface of the steel pipe is a straight line or a spiral, a half – Helical zigzag defect. Cause of production: 1) tube bloom: Center loose, segregation; shrinkage residual serious; non-metallic inclusions. 2) tube billet heating uneven, the temperature is too high or too low, the heating time is too long. 3) perforation area: plug wear; punch hole roller wear improper parameter adjustment; aging. Examining and judging: steel pipe surfaces are not allowed to exist in the fold and tube in the end of the fold should be grinding or cutting, grinding at the wall of the actual thickness value shall not be less than the standard minimum required; full-length fold sentenced to waste. 2 Inner Scar Features: the inner surface of the steel tube is spotted, it is generally not easy to peel off. Cause of production: 1) with impurities in the graphite lubricant. 2) the back end of the waste pipe is pressed into the inner wall of the steel pipe. Inspection found: steel pipe inner surface is not allowed, the tube end should be grinding and cutting, grinding depth should not exceed the standard requirements of negative deviation; The actual wall thickness shall not be less than the minimum standards; usually discarded inner scar. 3 raise skin Features: a linear or intermittent nail like tilt of the skin surface of the pipe. In capillary head, and easy peeling. Cause of production: 1) punch improper adjustment of parameters. 2) head steel. 3) the accumulation of iron oxide in the waste pipe, etc.. Inspection: the surface of the steel pipe allows the existence of non root easily peeling off (or in the heat treatment can be burned). For the root of the skin should be repaired or removed. 4 inside straight road Features: the surface of the steel pipe with a certain width and depth of the straight line shape. Cause of production: 1) the rolling temperature is low, the mandrel is stuck with a metal hard material. 2) graphite containing impurities, etc.. Inspection and judgment: 1) the inner straight channel of the bushing and the general pipe allows the depth of no more than 5% (maximum depth of pressure vessel 0.4mm). The super Chadenei straight should be grinding, resection. 2) edge sharp internal straight road to be smooth. 5 inner edge Features: a straight line shape with a certain width and depth in the inner surface of the steel pipe. Cause: mandrel wear, grinding is not smooth or too deep. Inspection and judgment: 1) casing, pipe tube allows the existence of height is less than honest wall 8%, the maximum height of no more than 0.8mm diameter of the inner edge does not affect the exist. The ultra poor should repair grinding and cut. 2) the existence of the inner edge of the general pipe and the pipe line pipe which allows the height not exceeding 8% (maximum height of 0.8mm). Super difference should be grinding and cut. 3) on the L2 level (ie N5) testing requirements of the steel pipe, the height of the height shall not exceed 5% (maximum height of 0.5mm). Super difference should be grinding and cut. 4) edge sharp inner edge grinding should be smooth. 6 inner drum kit Features: the inner surface of the steel tube is characterized by a regular convex super and no damage to the outer surface. Cause: the grinding amount is too large or the meat and so on. Inspection: according to the requirements of the inspection and sentenced. 7 pull concave Features: the inner surface of the steel pipe is presented with regular or irregular pits and no damage on the outer surface. Cause of production: 1) improper adjustment of continuous rolling, the roll speed does not match. 2) the tube blank is heated evenly or the temperature is too low. 3) rolling is offset from the center line, steel and rolling roller collision generation (Note: this reason 2003.1 proposed, principle is still under discussion. Check: no more than the wall thickness of the negative deviation, the actual wall thickness is greater than the wall thickness of the required minimum value of the pull concave. Excessive pulling concave should be removed. (Note: pull the concave serious development was ripping, such injury shall be strictly inspected). 8 internal threads (the defects produced only in arthel unit) Features: steel pipe inner surface spiral traces appear in the thin-walled pipe inner surface, obviously feel uneven. Cause of production: 1) the inherent defects of cross rolling process. The machine parameters adjustment at Assel, this defect is more prominent. 2) deformation distribution, arthel wall reduction quantity too large. 3) Assel roller type improper configuration. Inspection and judgment: the depth of the depth of internal thread defects of steel pipe is not more than 0.3mm, and within a certain tolerance range. Two, the external surface defects 1 external fold Features: the outer surface of the steel tube is a spiral shaped folding. Cause of production: 1) the surface of the tube blank is folded or cracks. 2) the subcutaneous pores of the tube blank, and the subcutaneous inclusions are more serious. 3) tube surface to clean up bad or wrong side handle, etc.. 4) during the rolling process, the surface of the steel pipe is cut off, and the steel tube is pressed into the base of the steel pipe through rolling, and the outer folding and the like are formed. Inspection: does not allow the existence of: minor can be repaired, the wall thickness and outside diameter of the actual value shall not be less than the minimum standard requirements. 2 separation Features: the surface of the steel pipe is a spiral or block of delamination and fracture. Cause: the non – metallic inclusions in the tube are serious, the residual shrinkage holes or serious loose. Prosecution: does not allow the existence of. 3 scar Features: the outer surface of the steel tube is presented with spot scar. Cause of production: 1) roll sticking steel, aging, wear or break roller. 2) a foreign body or wear rollgang stick. Inspection and judgment: 1) foreign film distribution should be grinding or scar resection. 2) in the pipe outside the scar, outside the scar area of more than 10% should be removed or grinding. 3) more than 5% of the thickness of scar depth should be grinding. 4. The thickness of the wall and the actual value of the outside diameter shall not be less than the minimum value of the standard. Features: steel pipe surface showing uneven Ma hang. Cause of production: 1) the length of the steel pipe in the furnace or the heating time is too high, so that the surface of the oxide scale is too thick, clear, rolled into the surface of the steel tube. 2) high pressure water and phosphorus removal equipment is not working, phosphorus removal is not clean, etc.. Inspection and judgment: 1) local does not exceed the negative deviation of the wall thickness of the pits are allowed. 2) surface area not exceeding pitted pipe area 20%. 3) the ultra poor grinding pits or removed, the grinding wall thickness, the outer diameter of the actual value of not less than the standard minimum requirements. 4) serious waste pits found. 5 green line Features: the outer surface of the steel tube is symmetrical or asymmetrical. Cause of production: 1) the hole type dislocation or serious wear. 2) the roll pass design is not reasonable. 3) cold rolled steel. 4) roller processing is not good, roll edge chamfer is too small. 5) roll assembly is not good, clearance is too large, etc.. Inspection and judgment: 1) the outer surface of the bushing allows for the presence of a height of not more than 0.2mm of the green line. 2) high pressure vessel type tube does not allow the existence of the touch green line. Feel the blue line must be cleared. Grinding should be smooth without edges and corners. 3) (structure, fluid, hydraulic support, etc.) of the ordinary pipe type steel pipe (structure, fluid, hydraulic support, etc.), the height of the 0.4mm green line is not allowed to exist. 4) edge sharp green line should be smooth. 5. The actual value of the wall thickness and the outside diameter of the grinding mill shall not exceed the minimum standard requirements. 6 hair pattern Features: in the outer surface of the steel pipe, a continuous or discontinuous hair like fine lines. Cause of production: 1) the tube blank has the skin pores or inclusions. 2) the surface cleaning is not complete, there is a small crack. 3 roll excessive wear, aging. 4 roll processing accuracy is not good, etc.. Inspection: the outer surface of the steel tube does not allow the existence of visible hair lines, such as the existence of a complete clearance, after removal of the wall thickness, outside diameter of the actual value shall not be less than the minimum standard requirements. 7 mesh crack Features: the outer surface of the steel pipe has ichthyosifo small crack banded and large pitch. Cause of production: Harmful elements (such as arsenic element) in the tube blank of 1. 2) wear hole roller aging, stick steel. 3) steel plate. Check: should be completely removed. The actual value of the wall thickness and outside diameter is not less than the standard requirements. 8 scratch Features: the outer surface of the steel pipe is spiral or linear shape groove defects, most of which can be seen at the bottom of the ditch. Cause of production: 1) mechanical damage mainly occurred in the roller and cooling, straightening and transport. 2) roll processing is not good or wear serious or roll seam clip have foreign body, etc.. Inspection and judgment: 1) on the outer surface of the steel pipe to allow the existence of no more than 0.5mm of the scratch, super 0.5mm scratch should be repaired. Grinding The actual value of the wall thickness and external diameter shall not be less than the minimum standard requirements. 2) edge sharp scratch should be smooth. 9 touch flat Features: the outer surface of the steel tube is a convex phenomenon, while the wall thickness of the steel tube is not damaged. Cause of production: 1) on the trolley to hit flat. 2) the straightening bite into a flat. 3) sizing mill roller touch flat. Inspection: the local non – Ultra – diameter negative deviation and the surface smooth can exist. Super time difference. 10 bumps Features: the outer surface of the steel pipe due to the impact of the law of the scars. Cause: can be produced in the cold region and various collision zone. Inspection and judgment: 1) the outer surface allows local depth of not more than 0.4mm bumps. 2) more than 0.4mm should be smooth and polished to repair damaged grinding at the outer diameter and wall thickness of the actual value of not less than the standard minimum requirements. 11. Features: the outer surface of the steel pipe is a spiral. Cause of production: 1) the angle of the straightening machine is not adjusted properly, the amount of pressure is too large. 2) straightening roller wear and so on. Inspection: the outer surface of the steel tube is allowed to have no obvious edges and corners, and the inner surface is not prominent, and the outer diameter is in accordance with the tolerance requirements. Removal of excessive correction. 12 roll off Features: steel pipe wall along the longitudinal fold showed local or long convex outer concave surface into strips, depression. Cause of production: 1) pass spread coefficient is too small. 2) mill adjustment caused by dislocation or rolling center line is not consistent. 3) the distribution of the weight distribution of each frame of the continuous rolling mill. Due to the above reasons the pipe in the rolling process of metal into the roll gap or tubes lose stability caused by pipe wall wrinkle. Prosecution: does not allow the existence of. Should be removed or sentenced to waste. 13. Features: the surface of the steel pipe has a broken phenomenon, which is produced on the thin wall tube. Cause of production: 1) due to tube billet heating temperature, so handsome deformation, low temperature part of the tension rolling, when the force is larger, the tube cracking. 2) the rolling mill frame speed and roll gap adjustment caused by improper pulling and tearing. 3) influence of the thickness of the capillary, when supply of the piercer mill, the shell wall thickness is small, in the rolling metal deformation ratio design of deformation decreases, resulting in rolling mill tension, tension and sometimes big tear. 4) the part of the tube billet itself is more serious. Prosecution: does not allow the existence of. Should be removed or sentenced to waste Three, the size of super poor 1 wall thickness is uneven Features: the wall thickness of the steel tube in the same section is not uniform, the maximum wall thickness and the minimum wall thickness difference is large. Cause of production: 1) tube blank heating uneven. 2) piercer rolling line is not adjustable is unstable, centering roller. 3) after eccentric wear or plug hole plug. 4) billet centering Kong Buzheng. 5) tube bending degree, cut too large. Detection: one by one measurement, the wall thickness of the uneven end should be removed. 2 wall thickness Features: steel pipe wall thickness of one direction ultra – poor, the ultra – positive deviation is called the wall thickness of ultra – negative deviation of the wall thickness of the thin. Cause of production: 1) tube blank heating uneven. 2) punch improper adjustment. Sentenced by a measurement, the end of the ultra poor should be removed, the full-length super difference should be commuted or discarded. 3 outside diameter Features: outside diameter of the steel pipe, the super positive difference is called the outside diameter, and the super negative difference is called the outside diameter. Cause of production: 1. The diameter of the sizing machine is too large, or the new pass design is not reasonable. 2) final rolling temperature is not stable. Sentenced by a measurement, exceed the standard should be given commuted or discarded. 4 bending Features: steel pipe along the length of the direction is not straight or in the end of the steel pipe with a goose head shaped bending called “the head of the goose””. Cause of production: 1) the local water cooling caused by artificial heat. 2) the adjustment is improper, the straightening roller wear is serious. 3) sizing machine processing, assembly and adjustment. 4) the lifting and transportation of bending. Inspection: when the bending degree exceeds the standard, it can be two times to re straighten, or sentenced to waste. Unable to straighten the “goose head bend” should be given to remove. 5 length super difference Features: the length of the steel pipe is beyond the requirement, and it is called the long rule. Cause of production: 1) the length of the tube blank exceeds the standard. 2) rolling instability. 3) when the cutting is not controlled well, etc.. Sentenced: long tube or short tube to cut, commuted or discarded Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Stainless steel welded pipe in the modern industrial production and life, more and more people are used to investigate the main reason is that the characteristics of stainless steel welded pipe, it is more convenient to use, but also economic and environmental protection. So how to maintain and maintain it, so that it can better serve our work, I believe that many people want to know. For in the interior of the stainless steel welded pipe, in use should pay attention to the following to avoid and don’t, stainless steel welded pipe and the like things, should avoid and chlorine ion contact, in daily welding and machining process, in order to protect our stainless steel welded pipe, we should try to avoid cutting is iron filings produced sparks, try to avoid friction and iron like stuff. The use of the process, should pay attention not to contact with all kinds of things, such as sulfuric acid, nitric acid and so on, organic acid is also not. Usually we use the debris is a lot of, should be careful to avoid the cement and lime contact, as far as possible to reduce pollution. Clean the process, but also to avoid the use of sewage and cleaning detergent for cleaning. For external use of stainless steel welded pipe, the general should be washed two times a year. Outside of the stainless steel welded pipe generally have the effect of rain water erosion. And the artificial cleaning is combined with the rain water erosion. Artificial cleaning using a sponge dipped in soapy water to clean the water. In general, the combination of rain washed and manual cleaning, the surface of the stainless steel welded pipe dust has a good effect, can maintain the perfect surface of stainless steel welded pipe. Is the first come into contact with stainless steel welded pipe industry, just know it is not only used for machinery, automobile, also be very ordinary used in bicycle, furniture, hotel, housing decoration and other mechanical components and structural parts. It is also very amazing to be able to have such a wide range of applications, and also want to know more about it, especially in terms of maintenance and maintenance. In fact in normal shops and selling stainless steel cleaning powder. It is mainly used to remove the stainless steel welded pipe surface of stubborn spots and stains. Use the time as long as directly on the surface of the stainless steel welded pipe dirt, wait 3 minutes later, washed with water, you can restore the bright as new. However, this method only applies to some small things, a month to clean, you can maintain a clean stainless steel welded pipe. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Seamless steel pipes are extensively applied for the nuclear device, gas, petrochemical, ship building and boiler industries. Seamless steel pipes dominates 65% of market share in Chinese boiler industry. Size: In the case of continuous charging, the size of the direct reduced iron is very important parameter. Small in size (1 ~ 2mm) materials may quickly oxidized when contacting the slag, it may be pumped flue. Size is too large (> 30mm) at the time of continuous charging can cause problems. When using a continuous charging method through the roof, should be limited to the proportion of < 2mm of sponge iron. Impact strength: Deoxidation iron should have a good impact strength, which can prevent a lot of powder formed. A large amount of powder when applied in an electric furnace is undesirable phenomenon occurs. Resistance to climate: direct reduced iron stored in the air, easily oxidized, and exothermic. The Deoxidation iron will reduce its long-term storage metallization rate, partly because of its loose structure, a large surface area. If the direct reduction of iron stored for six months in an open yard, its metallization rate will be reduced by 1%. Density: Deoxidation iron from the roof into the furnace, must be able to pass through the slag layer, to stay in the slag / steel liquid interface, so you can ensure efficient heat transfer and chemical reactions. If Deoxidation iron density is too low, it will float on the surface of the slag; and high density of the liquid steel will wear to go. Therefore, it is best to direct reduced iron density control in the range of 4 ~ 6g / cm3. Weight of the monomers: Deoxidation iron lump slag through time depends on how the timing. If the direct reduction of iron is small, remain too long in the slag, slag boiling phenomenon will occur. At this time, the slag fluidity plays a very important role. However, if the Deoxidation iron large, there will be strict control of slag liquidity requirements.

06th OIL & GAS AFRICA 2017 11 – 13 April, 2017, KICC – Nairobi, Kenya Int’l Trade Exhibition & Conference On Oil & Gas Products, Eqpt. & Machinery The 6th edition of OIL & GAS Kenya is set to make an even stronger impact in 2017. As most markets in the world are on a slow down, Africa is still sailing strong as one of the world’s fastest growing economies. As an organizer of trade events, we have experienced a 37% increase annually, in participation of foreign companies for the past 7 years. Exhibitors from 24 countries have occupied 80% of the exhibition space already and we foresee a full house by January 2017. We understand that yours is an export-oriented firm and explores new markets constantly. Email: ogexpo [AT] expogr [DOT] com  Tel: +971-4-3721421 WhatsApp : +971-56-4306143  Skype: expogroup.worldwide Address: 1910, 19th Floor, Monarch Office Tower, P.0. Box – 333840, One Sheikh Zayed Road, Dubai – UAE

Flange surface is smooth and decided the sealing surface of the connection effect, in the usual contact will have many such rough stainless steel flange, it is difficult to seal, so the roughness of the stainless steel flange for sealing effect is very important, here and share with you why roughness determine the connection quality of the stainless steel flange. First of all, it is clear that the surface roughness of the stainless steel flange has a great influence on the sealing effect, especially when the non soft gasket is used, the sealing surface roughness is the main cause of leakage. One reason. Turning stainless steel flange surface knife grain, for example, is the spiral line and using the metal gasket, if the roughness value larger pads can not blocked knife grain The spiral groove is formed under the pressure of the medium, the medium can be leaked out of the groove. Soft sealing gasket on the surface of the stainless steel flange to the extent Demand much lower. This is because it is easy to deform, can block the cutter profile, so as to prevent leakage. On the soft gasket, stainless steel flange and too smooth Adverse, because at this time the resistance to the leakage of the interface becomes smaller. So, if the stainless steel flange surface roughness is larger, we can use some soft gasket, in conjunction with the flange bolts to ensure that the stainless steel flange of the seal, as to how to choose in concrete flange gasket. This is usually the accumulation of experience. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Seamless stainless steel pipe for the use of engineering and construction is very widely, it is a hollow steel strip no seams, it is mainly used to transport liquids pipelines, different look and general steel,one of those heavy type steel, it has a strong resistance to corrosion, resistant to general corrosion. Will not rust, this performance makes seamless stainless steel pipes extend the life, the most important is that it is very clean and no toxins.  Compared with other plastic seamless steel pipe having strong mechanical resistance, impact regardless of how high a temperature is not interested in the use of seamless stainless steel pipe, it is mounted and the other pipe is the same, can replace other piped water and other liquids.  The characteristics of seamless stainless steel pipe are as follows: high precision can do small batch production. smaller diameter. weldability strong, high compression capability. steel pipe superior performance, relatively dense metal. Steel Cross area is more complex. high precision cold drawn products, good surface quality.

ERW steel pipes means Electric Resistance Welded Pipes. ERW steel pipes and tubes are used. ERW steel pipes and tubes are used in various engineering purposes, fencing, scaffolding, line pipes etc. Tolerance of outside diameter Standard Out Diameter Tolerance of Pipe End Tolerance of Pipe Body API 5L 219.1-273.1 +1.6mm, -0.4mm  ±0.75%  274.0-320 +2.4mm, -0.8mm ±0.75%  323.9-457 +2.4mm, -0.8mm ±0.75%  508 +2.4mm, -0.8mm ±0.75%  559-610 +2.4mm, -0.8mm ±0.75% Tolerance of wall thickness  Standard Grade Out Diameter Wall ThicknessAPI 5L / 219.1-457 +15%, -12.5% B 508-610 +17.5%, -12.5%  X42-X80 508-610 +19.5%, -8%

Design and manufacture of a tap The internal thread on the stamping elbow usually adopts tap for tapping processing. Because stainless viscosity is higher, chip breaking performance is poor, so prone to chip in the process of tapping scratch artifacts thread or tap the phenomenon such as collapse edge, affect the efficiency and the quality of thread. In order to prolong the service life of tap, improve the quality of thread machining, the following points should be paid attention to. (1) to choose better tap material. Add special alloy elements, in ordinary high speed tool steel tap could obviously improve the abrasion resistance and toughness. (2) in tap thread surface coated with titanium nitride coating, can significantly improve the tap wear resistance, heat resistance and lubricity. (3) more appropriate tap backoff. But should pay attention to, such as large amount of backoff, prone to chip in the blade into the tap in the phenomenon of poor and tapping the thread finish. (4) choose reasonable tool heat treatment method, in order to give attention to both tap of hardness and toughness. (5) more appropriate Angle before the tap. But should pay attention to, such as tap rake Angle is too large, when the blade cause tap collapse edge and tapping the thread edges. Second, the selection of tapping oil Tapping processing for the stainless steel stamping elbow, the selection of tapping oil is very important. Tapping oil must have good cooling and lubrication and rust prevention function. Such as tapping oil cooling effect is not good, then tap easy sticky, namely before the tap threads and Angle of surface bonding stainless steel scraps. Such as tapping oil lubrication effect is bad, is poor, tapping the thread finish and tap tapping resistance is big. Stainless steel special tapping oil effect is good, can use directly. In addition, also can use tapping oil essence oil and configure, but matching to the right. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)

Pipe connection is varied, the commonly used have iega profi-press, compression type and push type, welding type, and various derived connection mode. The following table shows the different orientations of pipe connection types: Connection typeConnection orientationFlanged, all types Fitting to pipe: Flanges are typically included on fittings. A separate flange is added to the pipe segment. Pipe to pipe: A separate flange is added to each pipe end to create the connection. Fitting to fitting: Fittings with inherent flanges connect directly to each other. No separate flanges are added to the connection.Threaded, Socket weld, Glued, Brazed Fitting to pipe: Pipe segments typically have inherent male ends, and fittings are typically female. The pipe inserts directly into the fitting. Pipe to pipe: A female coupling is inserted between the pipe segments. Fitting to fitting: Fittings connect directly to each other.Grooved Fitting to pipe: Fittings and pipe segments are considered to have grooved ends that are ready to accept a coupling. A coupling is added to connect the fitting and pipe. Pipe to pipe: A coupling is added to connect the pipe segments. Fitting to fitting: A coupling is added to connect fittings.Butt weld No extra objects are added. Fittings and pipe segments connect directly to each other. Note: The Piping domain includes a connection type called Same Connection. When Same Connection is configured for a pipe object that is attached to a hub, connector 1 inherits the connection type of the connection type on connector 2 of the attached hub. For more information, see Rules for Connector Behavior. Remember: To build parametric fittings content, see Adding Connectors to a Parametric Fitting and Rules for Creating Parametric Fittings Content.

The seven advantages of stamping elbow: The first, light weight, stamping elbow density of 0.89 0.91 g/cm, is only one over ten of the steel pipe. And because the light weight, can industry greatly reduce the transportation cost and installation of construction strength. The second, good corrosion resistance, stamping elbow with a few hydrogenation agent, resistant to various chemical media, excellent acid resistance, alkali resistance, corrosion resistance, will not rust, corrosion will not, will not breed bacteria, no electrochemical corrosion. Third, good heat preservation, as a result of the stamping elbow materials, low thermal conductivity, the thermal conductivity of 20 degrees Celsius 0.21 0.24 W/mk, than steel pipe (43 to 52 W/mk), purple steel pipe (333 W/mk), so the pp-r pipe heat preservation is good. Fourth, heat-resisting performance is good: stamping elbow working temperature is 70 degrees, softening temperature is 140 degrees. Fifth, high impact, because the impact strength of the stamping elbow unique performance than other solid wall pipe have markedly improved, the ring stiffness is equivalent to 1.3 times that of the solid wall. Sixth, health, non-toxic: stamping elbow materials completely consists of two elements carbon, hydrogen, did not add any toxic heavy metal salt stabilizers, material of health has been through the national authoritative department detection performance. Seventh, long service life: stamping elbow under the rated temperature and pressure, the service life of up to 50 years, has the uv protection, radiation protection, make the product that never fade. Source: wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com)