The seamless tube used for heat exchanger is one of the components of the heat exchanger, and is placed in the cylinder for exchanging heat between the two media. It has high thermal conductivity and good isothermal properties. It is a device that can quickly transfer heat from one point to another, with little heat loss, so it is called a heat transfer superconductor, which has a thermal conductivity of several thousand times copper.
In addition to seamless tubes, heat exchangers can also use various enhanced heat transfer tubes, such as finned tubes, threaded pipes, spiral grooved tubes, etc. When the heat transfer coefficient on both sides of tube inner diameter is very different, fins of fin tube should be placed on one side with low heating coefficient.
The commonly used dimensions of the heat transfer tubes (outer diameter * wall thickness) are mainly 19mmx2mm, 25mmx2.5mm and 38mmx2.5mm seamless steel tubes, 25mmx2mm and 38mmx2.5mm stainless steel tubes. The standard length is 1.5,2.0,3.0,4.5,6.0,9.0m and so on. The use of small diameter can increase the heat transfer area per unit volume, compact structure, reduce metal consumption and increase heat transfer coefficient. It is estimated that the heat exchange tube of the same diameter heat exchanger can be changed from 25mm to 19mm, the heat transfer area can be increased by about 40%, and the metal can be saved by more than 20%. But the fluid resistance is small, it is not easy to clean, easy to plug. Large diameter pipes are usually used for highly viscous or dirty fluids. Small diameter pipes are used for cleaning fluids.
http://www.xysteelpipe.com/info/Seamless-tube-for-heat-exchanger-1157-1.htm
2018年6月25日星期一
Measures to be taken on the casing production line
In order to maintain the stability of heat treatment products in the process of rapid heat treatment by induction, the following measures should be taken in the production line:
(1) The casing plant adopts the technology of continuous heating of steel bridges and uses bridging technology to improve the phenomenon of low steel temperature and increase steel production. A computer is used to control the head and tail of the steel; dual-frequency power is used to control the temperature at the end of the steel pipe; rotary joints are used to achieve great progress, etc. to increase the longitudinal temperature uniformity of the steel.
(2) Advanced steel conveyors are used to ensure uniform steel speeds. Steel tubes and large bars should rotate at a constant speed. The transmission mechanism should use variable frequency drive to improve the stability and reliability of the mechanism. This is one of the important conditions for ensuring that the longitudinal temperature of the phase material is uniform during rapid heating.
(3) Adopt advanced and reliable heating temperature control system, temperature closed-loop closed-loop control system is currently the best temperature control system in China. The tank manufacturer's control includes elements related to the heating temperature, such as power and molten steel speed, which can precisely control the level reached by the heating temperature.
http://www.xysteelpipe.com/info/Measures-to-be-taken-on-the-casing-production-line-1158-1.htm
(1) The casing plant adopts the technology of continuous heating of steel bridges and uses bridging technology to improve the phenomenon of low steel temperature and increase steel production. A computer is used to control the head and tail of the steel; dual-frequency power is used to control the temperature at the end of the steel pipe; rotary joints are used to achieve great progress, etc. to increase the longitudinal temperature uniformity of the steel.
(2) Advanced steel conveyors are used to ensure uniform steel speeds. Steel tubes and large bars should rotate at a constant speed. The transmission mechanism should use variable frequency drive to improve the stability and reliability of the mechanism. This is one of the important conditions for ensuring that the longitudinal temperature of the phase material is uniform during rapid heating.
(3) Adopt advanced and reliable heating temperature control system, temperature closed-loop closed-loop control system is currently the best temperature control system in China. The tank manufacturer's control includes elements related to the heating temperature, such as power and molten steel speed, which can precisely control the level reached by the heating temperature.
http://www.xysteelpipe.com/info/Measures-to-be-taken-on-the-casing-production-line-1158-1.htm
2018年6月22日星期五
Proper storage of screw tube
Proper way to preserve spiral pipe
1) Storage space spiral steel pipe products or warehouse, should be selected in clean, smooth drainage area, away from harmful gases or dust in factories and mines. The presence on the ground to clear the weeds and all the debris, keeping a clean steel
2) In a warehouse not with acid, alkali, salt, cement, steel and other aggressive materials stacked together. Different varieties of steel should be stacked separately, to prevent confusion, to prevent contact corrosion
3) Large steel, rail, steel disgrace, large diameter steel pipe, forgings, etc., may open dumps
4) Small and medium steel, wire rod, rebar, medium diameter steel pipe, steel wire and wire rope, etc., can be expected in a well-ventilated storage shed, but it must be the underlying thatch
5) Some small steel, sheet, strip, silicon, or thin-walled small-diameter steel pipes, all kinds of cold-rolled, cold-drawn steel products and high prices, corrosive metal products, can be stored for storage
6) A warehouse should be based on selected geographical conditions, the general ordinary enclosed warehouse, that is the roof with walls, doors and windows tight, with the Treasury ventilation device
7) Requires the Treasury sunny attention to ventilation, rain close attention to moisture, keep the appropriate storage environment
1) Storage space spiral steel pipe products or warehouse, should be selected in clean, smooth drainage area, away from harmful gases or dust in factories and mines. The presence on the ground to clear the weeds and all the debris, keeping a clean steel
2) In a warehouse not with acid, alkali, salt, cement, steel and other aggressive materials stacked together. Different varieties of steel should be stacked separately, to prevent confusion, to prevent contact corrosion
3) Large steel, rail, steel disgrace, large diameter steel pipe, forgings, etc., may open dumps
4) Small and medium steel, wire rod, rebar, medium diameter steel pipe, steel wire and wire rope, etc., can be expected in a well-ventilated storage shed, but it must be the underlying thatch
5) Some small steel, sheet, strip, silicon, or thin-walled small-diameter steel pipes, all kinds of cold-rolled, cold-drawn steel products and high prices, corrosive metal products, can be stored for storage
6) A warehouse should be based on selected geographical conditions, the general ordinary enclosed warehouse, that is the roof with walls, doors and windows tight, with the Treasury ventilation device
7) Requires the Treasury sunny attention to ventilation, rain close attention to moisture, keep the appropriate storage environment
Corrosion Insulation Performance of Spiral Steel Pipe
Anti-corrosion insulation pipe with corrosion resistance of steel, and has good insulation properties, has been widely used and promoted in building construction, and constantly improve and spread. Corrosion pipe insulation having different processing types and methods, different processing method to determine the pipe have different properties and functions, and the use range also changes. As the name suggests, it is to increase the number of external spiral steel pipe corrosion insulation class protection, in order to achieve low temperature can be used. In general, the use of second degree pipe insulation inorganic zinc-rich paint, which temperature ≥400 ℃, belonging to corrosion coating, conduit port is used polyethylene film called 3-layer PE or using cold sealing tapes to achieve the previously installed to prevent moisture entering into the water or construction.
Spiral steel pipe insulation for high temperature, water and fuel pumps, chemical pump corrosive. Insulation pipeline centrifugal pump series products with low noise, performance, energy efficient and reliable. The insulation material used is a multi-layer bandaging wrong seam, so it is effective to reduce the heat loss, but also able to control the jacket surface measures to prevent the generation of cold bridges, so that the outer coating of temperature control is guaranteed. Spiral steel pipe wrapped with insulation material multilayer reflective layer of aluminum foil, which can effectively reduce the loss of heat, and can make the steam pipe can be more economical and reasonable. Anti-corrosion steel pipe insulation is a good corrosion resistance, along with good insulation properties, has been widely used and promoted in the design and construction, the current and constantly perfected and popularized. Spiral steel also have different types and methods of processing, while the different processing method to determine the pipe have different properties and functions, and range will change!
Spiral steel pipe insulation for high temperature, water and fuel pumps, chemical pump corrosive. Insulation pipeline centrifugal pump series products with low noise, performance, energy efficient and reliable. The insulation material used is a multi-layer bandaging wrong seam, so it is effective to reduce the heat loss, but also able to control the jacket surface measures to prevent the generation of cold bridges, so that the outer coating of temperature control is guaranteed. Spiral steel pipe wrapped with insulation material multilayer reflective layer of aluminum foil, which can effectively reduce the loss of heat, and can make the steam pipe can be more economical and reasonable. Anti-corrosion steel pipe insulation is a good corrosion resistance, along with good insulation properties, has been widely used and promoted in the design and construction, the current and constantly perfected and popularized. Spiral steel also have different types and methods of processing, while the different processing method to determine the pipe have different properties and functions, and range will change!
2018年6月13日星期三
Select of Straight Seam Submerged Arc Welded Steel Pipe
(1) For high peak load requirements of the pipeline, because the user's gas consumption is very uneven, pipeline pressure fluctuations in the frequent, alternating stress steel to withstand large tubing will expand the existing defects in alternating stress, if more choice weld defects high probability of spiral welded steel pipe, the safe operation of the pipeline will not be guaranteed.
(2) Pipeline crossing earthquake fault or by topical highly seismic region, due to the geological activity of these lots frequent pipeline will have a vertical or axial alternating stresses. Spiral weld much higher than the probability of defect LSAW steel pipe, under long-term stress, spiral welded steel pipe is much higher than the probability of an accident LSAW steel pipe, therefore, in such areas should be used straight submerged arc welded pipe.
(3) Internal and external coating requires a high piping should be used LSAW. Spiral submerged arc welded pipe weld more general than the weld reinforcement LSAW high, when the steel pipe internal and external corrosion, anti-corrosion materials and combination of the bare tube is not as close LSAW, anticorrosive effect is not good LSAW steel pipe.
(4) For important wear across the engineering, use LSAW. Due to difficulties in future maintenance and management than the general line segment, therefore, the use of excellent performance LSAW particularly necessary.
(5) For the pipeline weaknesses, such as heat and simmer elbow pipe should be used LSAW. Heat simmer elbow since the direction of change, their exposure to internal and external forces than the general line of straight pipe should be large, due to the impact of various factors in the simmering process, it is not easy to eliminate stress, is a long-distance pipeline in the weak link , integrated performance good LSAW can make up for these deficiencies.
(2) Pipeline crossing earthquake fault or by topical highly seismic region, due to the geological activity of these lots frequent pipeline will have a vertical or axial alternating stresses. Spiral weld much higher than the probability of defect LSAW steel pipe, under long-term stress, spiral welded steel pipe is much higher than the probability of an accident LSAW steel pipe, therefore, in such areas should be used straight submerged arc welded pipe.
(3) Internal and external coating requires a high piping should be used LSAW. Spiral submerged arc welded pipe weld more general than the weld reinforcement LSAW high, when the steel pipe internal and external corrosion, anti-corrosion materials and combination of the bare tube is not as close LSAW, anticorrosive effect is not good LSAW steel pipe.
(4) For important wear across the engineering, use LSAW. Due to difficulties in future maintenance and management than the general line segment, therefore, the use of excellent performance LSAW particularly necessary.
(5) For the pipeline weaknesses, such as heat and simmer elbow pipe should be used LSAW. Heat simmer elbow since the direction of change, their exposure to internal and external forces than the general line of straight pipe should be large, due to the impact of various factors in the simmering process, it is not easy to eliminate stress, is a long-distance pipeline in the weak link , integrated performance good LSAW can make up for these deficiencies.
Quality Inspection of Spiral Pipe
Before the mechanical performance test, flattening test and expansion test, the screw pipe factory should carry out the test first and meet the standard requirements. Straight seam steel quality inspection method is as follows:
1, From the face of it, that is visual inspection. Visual inspection of welded joints is a simple procedure but widely used test method is an important part of product testing, the main defects and deviations are found on the surface of the weld size. Usually by the naked eye, with the standard model, gauge and test tools such as a magnifying glass. If the weld surface defects, weld defects there may be internal.
2, Physical test methods: physical test method is to use some physical phenomena assay or test method. Or within the workpiece material defect inspection, and are generally used NDT methods. NDT ultrasonic flaw detection, radiation detection, penetration testing, magnetic testing and so on.
3, Pressure vessels strength test: pressure vessels, in addition to tightness test, but also the strength test. There are common test of two hydraulic test and air pressure. They can be tested in working under pressure vessels and piping welds compactness. Hydrostatic pressure test is more sensitive than the test speed and, at the same time after the test products do not waste water treatment, drainage problems for the product is particularly applicable. But the risk is greater than the test pressure test. When tested, it must comply with the appropriate safety measures to prevent accidents during the test.
4, Compact test: liquid or gas storage vessel welding, which is not dense weld defects, such as penetrating cracks, pores, slag, incomplete penetration loose tissue and the like, can be used to find the density test. Compactness test methods are: kerosene test, carrying water testing, water will test etc.
5, Hydrostatic test: each pipe hydrostatic test should be done without leakage test pressure press Calculate P = 2ST / D where S- hydrostatic test stress test Mpa, hydrostatic test stress testing in accordance with corresponding steel standard specifies the minimum degree of yield (Q235 is 235Mpa) 60% of the selection.
Check www.tjxysteel.com for more info
1, From the face of it, that is visual inspection. Visual inspection of welded joints is a simple procedure but widely used test method is an important part of product testing, the main defects and deviations are found on the surface of the weld size. Usually by the naked eye, with the standard model, gauge and test tools such as a magnifying glass. If the weld surface defects, weld defects there may be internal.
2, Physical test methods: physical test method is to use some physical phenomena assay or test method. Or within the workpiece material defect inspection, and are generally used NDT methods. NDT ultrasonic flaw detection, radiation detection, penetration testing, magnetic testing and so on.
3, Pressure vessels strength test: pressure vessels, in addition to tightness test, but also the strength test. There are common test of two hydraulic test and air pressure. They can be tested in working under pressure vessels and piping welds compactness. Hydrostatic pressure test is more sensitive than the test speed and, at the same time after the test products do not waste water treatment, drainage problems for the product is particularly applicable. But the risk is greater than the test pressure test. When tested, it must comply with the appropriate safety measures to prevent accidents during the test.
4, Compact test: liquid or gas storage vessel welding, which is not dense weld defects, such as penetrating cracks, pores, slag, incomplete penetration loose tissue and the like, can be used to find the density test. Compactness test methods are: kerosene test, carrying water testing, water will test etc.
5, Hydrostatic test: each pipe hydrostatic test should be done without leakage test pressure press Calculate P = 2ST / D where S- hydrostatic test stress test Mpa, hydrostatic test stress testing in accordance with corresponding steel standard specifies the minimum degree of yield (Q235 is 235Mpa) 60% of the selection.
Check www.tjxysteel.com for more info
Spiral submerged arc welding pipe production molding
Spiral submerged arc welded pipe production, forming and welding is carried out simultaneously, so the stability of the welding quality is good or bad and forming inseparable. Molding seam ebbed and flowed, "pout", the tight loose outside the tight loose inside, pitch shifting of local wrong side, squeeze the thick side plates, missing the cut, wave, burrs and bevel irregular porosity, lead to adverse and weld undercut, burn down, pores, slag and other defects forming. Therefore, we found it necessary to promptly adjust molding instability.
The flux of foreign influence and control weld shape spiral submerged arc welded pipe weld quality and chemical composition of the flux, viscosity, bulk density, particle size and stack height and other factors are closely related.
Chemical composition and viscosity of the flux component has a great influence on the weld. Although various manufacturers solder flux are in line with GB / T 5293-1999 standards, but because of its formula, its metallurgical properties and process performance are not the same. When choosing, we can observe, test, analyze and compare, select the best person. The choice of flux should ensure that you have good metallurgical and technological properties, stable arc slag has a suitable melting point, viscosity and surface tension, and the weld is good, easy slag removal and produce fewer toxic gases.
Flux is generally believed that small viscosity, improving the fluidity of the slag to make a good weld. High viscosity flux resulting weld no ripple, but molding defects. When using a particularly low melting point solder, flux melting capacity of more weld pool surface pressure, causing the gas precipitated difficulties, the gas concentrated in the slag below, so that weld is not stable. In order to obtain a good weld, slag thickness around the arc chamber to the right, with the temperature changes the viscosity should be moderate.
The flux of foreign influence and control weld shape spiral submerged arc welded pipe weld quality and chemical composition of the flux, viscosity, bulk density, particle size and stack height and other factors are closely related.
Chemical composition and viscosity of the flux component has a great influence on the weld. Although various manufacturers solder flux are in line with GB / T 5293-1999 standards, but because of its formula, its metallurgical properties and process performance are not the same. When choosing, we can observe, test, analyze and compare, select the best person. The choice of flux should ensure that you have good metallurgical and technological properties, stable arc slag has a suitable melting point, viscosity and surface tension, and the weld is good, easy slag removal and produce fewer toxic gases.
Flux is generally believed that small viscosity, improving the fluidity of the slag to make a good weld. High viscosity flux resulting weld no ripple, but molding defects. When using a particularly low melting point solder, flux melting capacity of more weld pool surface pressure, causing the gas precipitated difficulties, the gas concentrated in the slag below, so that weld is not stable. In order to obtain a good weld, slag thickness around the arc chamber to the right, with the temperature changes the viscosity should be moderate.
Seamless casing production method
At present, many oil companies are maintaining the seamless casing of oil and do not allow the use of the hardbanding. Many drilling companies have thought of many ways to remove the carbonized tungsten-removing hardband of the drill pipe.
During the process of hardbanding welding, Due to various reasons, the quality of the hardbanding was inevitably unsatisfactory, and it was necessary to re-weld. The previous measures were to stop the grinding of the portable grinder, which was time consuming and inefficient. In order to safeguard the professional and technical personnel to stop the analysis and discussion, the drill rod hardband automatic removal equipment was finally developed.
During the operation process, only the power supply needs to be closed, the drill pipe is turned into the drill rod transmission line, and the transmission line is automatically started under the editing sequence. When the drill pipe is in place, the transmission line is stopped and the cylinder automatically places the transmission line. The control button is used to tighten the task with the electric chuck. Under the sequence control, the switch is started in order and the air supply, cooling water supply, and axial movement are tightened. Radial movement, after the end of cutting is completed, under the programmable control, tighten the air supply, the cooling water supply to the extent of axial movement, radial shift to stop and automatically reset, is the transmission line against the drill rod out, after the cylinder automatically Turning the drill rod out, and automatically controlling the process in good condition, the use of this equipment will greatly improve the quality of the drill rod hardband removal and aggravate the worker's workload.
Seamless casing is an important equipment for oil drilling, as well as other equipment drill pipes, core pipes and casings, drilling borings, and small-diameter drilling oil casing, etc., which are in the course of drilling and drilling of oil wells and after completion. The support of the borehole wall ensures that the well is fully operational after the drilling process is stopped and completed. So deal with oil drilling to remove the hard-wearing drill pipe problems, deal with the performance of drill belt joints when the outer wear belt is very hard to remove, the operation is complex and safe, the automation level is high, the joint efficiency is high, and the cut is clean. For a wide range of pipe diameters, music tone is small, and the use of oil casing does not purify the environment, device debugging is also very convenient.
http://www.xysteelpipe.com/info/Seamless-casing-production-method-1133-1.htm
During the process of hardbanding welding, Due to various reasons, the quality of the hardbanding was inevitably unsatisfactory, and it was necessary to re-weld. The previous measures were to stop the grinding of the portable grinder, which was time consuming and inefficient. In order to safeguard the professional and technical personnel to stop the analysis and discussion, the drill rod hardband automatic removal equipment was finally developed.
During the operation process, only the power supply needs to be closed, the drill pipe is turned into the drill rod transmission line, and the transmission line is automatically started under the editing sequence. When the drill pipe is in place, the transmission line is stopped and the cylinder automatically places the transmission line. The control button is used to tighten the task with the electric chuck. Under the sequence control, the switch is started in order and the air supply, cooling water supply, and axial movement are tightened. Radial movement, after the end of cutting is completed, under the programmable control, tighten the air supply, the cooling water supply to the extent of axial movement, radial shift to stop and automatically reset, is the transmission line against the drill rod out, after the cylinder automatically Turning the drill rod out, and automatically controlling the process in good condition, the use of this equipment will greatly improve the quality of the drill rod hardband removal and aggravate the worker's workload.
Seamless casing is an important equipment for oil drilling, as well as other equipment drill pipes, core pipes and casings, drilling borings, and small-diameter drilling oil casing, etc., which are in the course of drilling and drilling of oil wells and after completion. The support of the borehole wall ensures that the well is fully operational after the drilling process is stopped and completed. So deal with oil drilling to remove the hard-wearing drill pipe problems, deal with the performance of drill belt joints when the outer wear belt is very hard to remove, the operation is complex and safe, the automation level is high, the joint efficiency is high, and the cut is clean. For a wide range of pipe diameters, music tone is small, and the use of oil casing does not purify the environment, device debugging is also very convenient.
http://www.xysteelpipe.com/info/Seamless-casing-production-method-1133-1.htm
Differences Between Precision Steel Pipe and Seamless Steel Pipe
Differences between precision steel pipe and seamless steel pipe：
1. The main features of seamless steel pipe are welding without seam and can bear great pressure. The products can be made from rough casts or cold drawn parts.
2.Precision steel pipes appear just in recent years, and there are strict tolerance and roughness between the inner hole and the outer wall size.
Cold drawn precision steel pipe features:
1). Have a smaller diameter.
2). Can be made in small quantities due to its high precision.
3). Finished cold drawn products have high precision and good surface quality.
4). The cross section of the steel pipe is more complicated.
5). The steel pipe has superior performance and its metal is relatively dense.
Hot-rolled precision steel pipes are made from continuous casting round billets or roughed slabs which are heated by walking beam furnace and then put into rough mill after high-pressure water descaling; rough materials are sent into finishing mill after cutting head and tail; we adopt the implementation of computer-controlled rolling and rough materials finally become straight rolls after rolling through laminar cooling and coiler. The heads and tails of the straight rolls are in shapes of tongue and fish, with relatively poor thickness, width accuracy and defects of wave shape, folding and tower shape. Its coil weight is heavy and the inner diameter of the steel coil is 760mm. After finishing line treatments of cutting head and tail, trimming and multi-pass straightening and skin passing treatments, recut or re-roll the straight roll, we will obtain finished products: hot-rolled steel plate, flat hot rolled coil and strip, etc. The hot rolled pickled steel plate can be made from hot rolled finishing coils by pickling, removing the scale and oiling.
http://www.xysteelpipe.com/info/Differences-Between-Precision-Steel-Pipe-and-Seamless-Steel-Pipe-1134-1.htm
1. The main features of seamless steel pipe are welding without seam and can bear great pressure. The products can be made from rough casts or cold drawn parts.
2.Precision steel pipes appear just in recent years, and there are strict tolerance and roughness between the inner hole and the outer wall size.
Cold drawn precision steel pipe features:
1). Have a smaller diameter.
2). Can be made in small quantities due to its high precision.
3). Finished cold drawn products have high precision and good surface quality.
4). The cross section of the steel pipe is more complicated.
5). The steel pipe has superior performance and its metal is relatively dense.
Hot-rolled precision steel pipes are made from continuous casting round billets or roughed slabs which are heated by walking beam furnace and then put into rough mill after high-pressure water descaling; rough materials are sent into finishing mill after cutting head and tail; we adopt the implementation of computer-controlled rolling and rough materials finally become straight rolls after rolling through laminar cooling and coiler. The heads and tails of the straight rolls are in shapes of tongue and fish, with relatively poor thickness, width accuracy and defects of wave shape, folding and tower shape. Its coil weight is heavy and the inner diameter of the steel coil is 760mm. After finishing line treatments of cutting head and tail, trimming and multi-pass straightening and skin passing treatments, recut or re-roll the straight roll, we will obtain finished products: hot-rolled steel plate, flat hot rolled coil and strip, etc. The hot rolled pickled steel plate can be made from hot rolled finishing coils by pickling, removing the scale and oiling.
http://www.xysteelpipe.com/info/Differences-Between-Precision-Steel-Pipe-and-Seamless-Steel-Pipe-1134-1.htm
Features of 3LPP Coated Pipes
The coating pipe of 3LPP consists of multiple layers of anti-corrosion coatings, the inner layer is welded epoxy layer, the middle layer is adhesive layer, and the outer layer is polypropylene layer.The inner layer is used for protection against corrosion and chemical damage while the outer layer is used for protection against any physical damage in laying and transportation.
The 3 layer polypropylene coated pipes are used in oil fields where the resources are drawn from deep reservoirs and at high temperatures (100oC to 140oC). It is highly abrasion resistant and is generally used where the chances of damage are high such as Rocky Mountains or for drilling operations.
Features of 3LPP coated pipes:
1. Excellent chemical and corrosion resistance preventing steel pipes from any damage.
2. Resistance to cathodic disbondment
3. The 3LPP coated pipes are highly abrasion resistant and can withstand high temperatures.
4. The 3LPP coated pipes have high performance characteristics and an extended life cycle.
http://www.xysteelpipe.com/info/Features-of-3LPP-Coated-Pipes-1135-1.htm
The 3 layer polypropylene coated pipes are used in oil fields where the resources are drawn from deep reservoirs and at high temperatures (100oC to 140oC). It is highly abrasion resistant and is generally used where the chances of damage are high such as Rocky Mountains or for drilling operations.
Features of 3LPP coated pipes:
1. Excellent chemical and corrosion resistance preventing steel pipes from any damage.
2. Resistance to cathodic disbondment
3. The 3LPP coated pipes are highly abrasion resistant and can withstand high temperatures.
4. The 3LPP coated pipes have high performance characteristics and an extended life cycle.
http://www.xysteelpipe.com/info/Features-of-3LPP-Coated-Pipes-1135-1.htm
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