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Q345 is a steel material. It is a low-alloy steel (C <0.2%), widely used in bridges, vehicles, ships, buildings, pressure vessels. Q represents the yield of this material, behind the 345, the yield refers to the value of this material, approximately 345. And will increase the thickness of the material and its yield value decreases. Q345A, Q345B, Q345C, Q345D, Q345E. This is a class distinction represents mainly the impact of temperature differs only! Q345A level, it is not to shock; Q345B grade is 20 degrees room temperature impact; Q345C level, is 0 degree impact; Q345D level is -20 degree impact; Q345E level is -40 degrees impact. The impact of different temperature, shock value are different. In the plate, the case of low-alloy series. In low-alloy material where such material is the most common. Q235 and Q345 of difference Difference of Yield strength limit: A: Yield strength limit Q235 is 235MPa, B: yield strength limit Q345 is 345MPa (Q of Chinese characters meaning “bend”, which value represents the yield strength of the lower back) 2, the two different alloy content: A: Q235 ordinary carbon steel, Q235 is carbon steel, Q235– metal structure, the center of strength less demanding carburizing or cyanide parts, rod, rods, hooks, coupler, bolts and nuts, set cylinder, shaft and weldments B: Q345 low-alloy steel, Q345 low-alloy structural steel, Q345– good mechanical properties, low temperature performance can, good ductility and weldability, used as the low-pressure vessels, tanks, vehicles, cranes, mining machinery, structural, mechanical parts, building structures, metal structures in general, hot-rolled or normalizing state power plants, bridges, etc. to withstand dynamic load of use, can be used for all kinds of steel above -40 ℃ cold areas.

UOE is a method used for production of longitudinally welded large diameter pipes. Longitudinal edges of steel plates are first beveled using carbide milling equipment. Beveled plates are then formed into a U shape using a U-press and subsequently into an O shape using an O-press. UOE Pipes Manufacturing Process Demo The UOE mill is the best suitable process to meet customers’ requirements by virture of the characteristic of high production efficiency, stable product quality and various accessories for manufacturing and inspection.

LSAW Pipe stands for Longitudinally Submerged Arc Welding pipe. Pipes manufactured by this process are subjected to expanding operation in order to relieve internal stresses and obtain a perfect dimensional tolerance. Longitudinally welded steel pipes are used in onshore and offshore oil and gas pipelines requiring critical service, high performance and tight tolerances. LSAW pipes are also used in conveyance of flammable & nonflammable liquids, and as structural members in construction projects. LSAW pipe (longitudinal Submerged Arc Welding Pipe)  is fromed by JCOE with one straight welded seam, the outer diameters usually from 323mm to 1420mm. When the outer diameter is 914.4mm above, it’s allowed two straight welded seams. LSAW pipe is used to convey low pressure liquid meida or high pressure petroleum or natural gas, and can be also used widely in structural supports or foundation. The advantage for LSAW type is they could produce more thick wall thickness of pipes, maximum to 120mm. Size: Outer Diameter: 219mm-1820mm Wall Thickness: 5.0mm-50mm Length: 6mtr-18mtr End:square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled, Surface: Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy,? Fusion Bond Epoxy, 3-layers PE) Packing:Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps. Test:Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test.

Thick wall steel pipe refers to the pipe diameter and wall thickness ratio of less than 20. Thick walled steel pipe is the pipe diameter and wall thickness ratio of less than 20 steel pipe. Mainly used in petroleum geology drilling pipe the petrochemical cracking tube, boiler tubes, the bearing tube as well as automobiles, tractors, aviation high-precision structural tube. The biggest difference between thick wall steel pipe and thin wall steel pipe is the pipe wall thickness, in general, are drawn thin-walled steel technology, and general use of hot-rolled thick walled steel pipe technology, if it is used to distinguish between units of measure, then, generally, the wall thickness / diameter equal to 0.02 is thick and thin-walled steel pipe watershed, wall thickness / diameter less than 0.02 thin-walled steel pipe, thick wall steel pipe is greater than in the purposes, the thin-walled steel multi-purpose the pipe. The multi-walled steel hollow parts used in the blank. Pressure as well as an important channel to use.  Thick walled steel mainly used in water engineering, petrochemical industry, chemical industry, power industry, agricultural irrigation, urban construction. For the transport of liquids: water supply and drainage. For gas transportation: gas, steam, liquefied petroleum gas. For structural purposes: as piling pipe for bridges; docks, roads, buildings and other structures tube.  The key of quality for thick wall steel pipe should be thickness uniformity, thick walled steel pipe wall thickness is not controlled directly affect the quality and usefulness of steel pipe, thick wall steel pipe, large diameter seamless steel pipe for general use in a variety of machining, thick wall parts processing, uniform wall thick-walled steel pipe will directly affect the quality of post-processed parts, thick-walled steel pipe wall is not controlled, the overall quality of steel is not strictly. Welding thick walled steel pipe firstly clean oil, paint, water, rust, etc., then the groove wall, opened a large number of thick, thin it to open a small number (angle grinder), then that is on the product gap, rod or wire diameter is generally 1 – 1.5 times, if you are not careful groove was opened a few words can be appropriate to stay small. Tack welding at least three o’clock, four o’clock generally good work. Welding welding time should be half and half, starting from the lowest point, preferably more than a centimeter or so, so good from the opposite connector. If the pipe wall thickness, it should be layered, at least two layers, the first layer of the whole circle until they have finished welding can weld the second floor. Thick Walled Large Diameter LSAW Pipe Size: OD :351-1050mm, thickness :8-30mm  Material: 20 #, 16Mn, Q235B, Q345B, X42, X52, X70, alloy steel, stainless steel.  Standard:GB/T3091-2001, GB/T 3092-1993, GB/T 9711.1-1997, GB/T9711.2, GB/T9711.3t etc.

Gears are stainless steel lap joint stub end products one of the main parts and basic parts, some parts also need to undertake stainless steel lap joint stub end processing, gear failure modes are mainly on the surface of the tooth fatigue crack, wear and broken. Working conditions and failure mode of the gear to stainless steel lap joint stub end material should have high fatigue strength and contact fatigue strength and tooth surface should have high hardness and wear resistance, core should have enough strength and toughness. stainless steel lap joint stub end On the impact of the work is smooth, no strong, without too much load is not big, rotational speed, shape, not too complicated, size is not too big gear, can choose 20.45, 40 cr, 4 omnb such as low carbon steel, medium carbon steel, medium carbon low alloy steel and other materials, after tempering, surface quenching or permeability quenching manufacture. As for poor working conditions, load, high speed, large and often impacted by the strong, shape more complex. Size larger gears, because of the quality of stainless steel lap joint stub end material performance and heat treatment requirements, can choose a few alloy steel.

Spiral submerged arc welding(SSAW) is its forward direction and forming tube centerline hose reel molding angle (adjustable), side molding edge welding and weld them into a spiral. (Spirally Submerged Arc Welding pipes) SSAW pipes: SSAW pipes are produced by spiral (helicoidal) welding of steel coil and have a cost advantage over LSAW pipes, as the process uses coils rather than steel plates. As such, in applications where spiral-weld is acceptable, SSAW pipes may be preferred over LSAW pipes. Both LSAW pipes and SSAW pipes compete against ERW pipes and seamless pipes in the diameter ranges of 16”-24”. SSAW pipes are mainly used in petroleum and natural gas industry to transport flammable and non-flammable liquid and steel construction. Size:(O.D×Wall Thickness)mm×Length(mm)219-3200mm×5-30mm x 12000mm+500mmIn addition to above specification, the pipes can be produced according to customer’s requirements.Execute Standard:ASTM A252-89 WELDE AND SEAMLESS STEEL PIPE PILESAPI SPEC 5L Specification for Line PipeGB/T9711.1 Petroleum and natural gas industries—Steel pipe for pipelines—Technical delivery conditionsSY/T5037 Spiral submerged arc welded pipe for low pressure liquid transportationMaterial:Q235-Q345,　L175-L485,　SS400,　16Mn,　L290-L360 or according to the customer’s requirements. Pipe End: square ends (straight cut, saw cut, and torch cut). or beveled for welding, beveled, Surface: Lightly oiled, Hot dip galvanized, Electro galvanized, Black, Bare, Varnish coating/Anti rust oil, Protective Coatings (Coal Tar Epoxy,  Fusion Bond Epoxy, 3-layers PE) Packing: Plastic plugs in both ends, Hexagonal bundles of max. 2,000kg with several steel strips, Two tags on each bundle, Wrapped in waterproof paper, PVC sleeve, and sackcloth with several steel strips, Plastic caps. Test: Chemical Component Analysis, Mechanical Properties (Ultimate tensile strength, Yield, strength, Elongation), Technical Properties (Flattening Test, Bending Test, Blow Test, Impact Test), Exterior Size Inspection, Hydrostatic Test, X-ray Test. Major applications: (Spirally Submerged Arc Welding pipes) SSAW pipes are widely used in Oil, Natural Gas, Water and other flammable & nonflammable liquid conveyance and distribution pipelines, steel structures for construction and other general purposes by means of their wide size range.

The basic technological process of stainless steel elbow is that: under the material roll bending welded into a closed ring shell ring shell internal pressure forming segment. Usually the processing technology is to use the mold to suppress the multi block housing, and then welded to complete. Many processes require different fixture or tooling, high manufacturing cost and cycle length, and the process of large thin wall parts is very poor. The development of hydraulic expansion technology for large thin-walled parts of the forming process. Stainless steel elbow is a kind of thin-walled parts, for the processing of thin-walled parts, the process is difficult. The development of hydraulic expansion technology provides a new way for the forming of large thin wall parts. The model free hydraulic bulging technology is a new type of hydraulic forming technology, which has the characteristics of low cost, short processing cycle, good forming and so on. The basic process is: the plate or after bending single curvature shell plate, welded closed polyhedron. Stainless steel elbow Then, under the action of internal pressure, the shell has a plastic deformation, and gradually tends to be ideal. The basic process of the large stainless steel elbow is: under the material, roll bending, welding into a closed ring shell, internal pressure forming. Usually the processing technology is to use the mold to suppress the multi block housing, and then welded to complete. Many processes require different fixture or tooling, high manufacturing cost and cycle length, and the process of large thin wall parts is very poor. The development of hydraulic expansion technology provides a new way for the forming of large thin wall parts. wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com) provides stainless steel tee, stainless steel flange, stainless steel head, so different diameter pipe etc., affordable, welcome the masses of old and new customers to come to consult Oh!

Stainless steel reducer‘s arc length calculation method for: For example: stainless steel concentric reducer, a big head radius for R1, capitulum radius R2, high for H, The 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. Infidelity reducer according to sheet metal drawing.

Stainless steel reducer without die drawing process is a kind of metal flow stress vary with temperature and change the nature of the implementation of flexible plastic processing technology, is a kind of high precision, high efficiency and low energy consumption, no pollution, no mold, no friction, no lubrication nearly plastic forming technology. Different materials tensile properties. Tensile rate limits the proportion of blank diameter and diameter of stamping. Control control from 2.1 to 2.2 and carbon steel stainless steel material in 2.15 to 2.5. Stainless steel material to deep drawing for the second time after deep drawing, but different from carbon steel materials, stainless steel usually cannot be equal to the first degree of stretching, unless after heat treatment. Stainless steel reducer material requirements of devices is the power of the carbon steel material 1 to 2 times. Stainless steel reducer Generally best deep drawing using double acting hydraulic equipment. On the tensile deformation of stainless steel reducer without wall thickness change has carried on the experimental study, when there is no mould drawing stainless steel reducer is analyzed the influence factors of wall thickness change and the influence law. Determine the stainless steel reducer without mold wall thickness changes when stretching empirical formula. wilsonpipeline Pipe Industry Co., Limited (www.wilsonpipeline.com) provides stainless steel elbow, stainless steel tee, stainless steel flange, stainless steel pipe, stainless steel reducer, such as size, affordable, welcome new and old customers to come to consult! If any inquiry about products, please feel free to contact us sales@wilsonpipeline.com

SMAW (shielded metal arc welding) is the most widely used in industrial production welding method, it is the use of an arc discharge (commonly known as the arc burning) heat generated melts the electrode and the workpiece with each other and form a weld after condensation, thereby obtaining a solid welded joints process. SMAW electrodes are manipulated by hand welding work can be welding, vertical welding, horizontal and overhead welding and other welding position welding. In addition, as SMAW equipment lightweight, nimble handling, so that the SMAW welding operations can be performed in any place of power. Applicable to all kinds of metal materials, various thickness, various structural shapes welded.  SMAW safety features: the load voltage SMAW welding equipment typically 50V-90V, while the body can withstand voltage is safe 30V-45V, shows that manual arc welding equipment, would have caused life danger, when welding, must wear good protective clothing. Arc welding can be pided into SMAW, semiautomatic (Arc) welding, automatic (arc) welding. Automatic (Arc) welding usually refers to automatic submerged arc welding – covered with a protective layer of flux welding parts, light wire is inserted into the filler metal solder layer metal arc welding, flux arc buried under layers melting heat generated by the arc welding wire, solder and the base metal formed weld, the welding process is automated. The most commonly used is the SMAW.  One of the limitations is SMAW welding speed, it is subject to periodic welder stop welding, to replace a length of 9-18 inches rod limit. SMAW have been other semi-mechanization and automation of welding processes are replaced in many applications, the reason is that these processes are compared with the SMAW, have higher productivity. Another drawback SMAW also affect productivity, clean up after welding welding slag. Also, when using low hydrogen electrodes, also need to have adequate storage facilities, such as a low oven to keep it moist degrees.

Spiral submerged arc welding (SSAW) as raw material is often warm extrusion molding, automatic double -sided wire submerged arc welding process. Spiral submerged arc welding (SSAW) process performance: (1) raw materials that strip, wire, flux. Must go through rigorous testing before being put into the physical and chemical. (2) strip head and tail docking, using single or double wire submerged arc welding, in rolled steel by automatic submerged arc welding. (3) Before molding, the strip after flattening, cutting, trimming, planing, surface cleaning and transportation to the curved edge treatment.  (4) the use of electrical contacts on both sides of the conveyor control the pressure cylinder pressure to ensure the smooth delivery of the strip.  (5) the use of internal or external control roll forming.  (6) the weld gap control device to ensure that the weld gap to meet the welding requirements, diameter, volume and the wrong side of the weld gap have been strictly controlled.  (7) the welding and soldering are used outside the United States Lincoln welding machine for single or double wire submerged arc welding, to obtain stable welding specifications.  (8) After welding the weld line continuous ultrasonic injury checked to ensure 100% coverage of non-destructive testing of spiral weld. If defective, automatic alarm and spraying tags, production workers so adjusting the process parameters, and remove defects.  (9) the use of air plasma cutting machine to cut a single tube.  (10) cut into a single pipe, the first three of each batch of steel to carry out strict inspection system, inspection of weld mechanical properties, chemical composition, fusion status, steel surface quality and after NDT inspection to ensure that the process pipe after passing to formally put into production.  (11) there is a continuous sonic flaw marks the site of the weld, manual ultrasonic and X-ray review, if there are defects after repair again after destructive testing until confirmation defect has been eliminated.  (12) strip on the spiral weld seam and intersects with D-type connector where the pipe all through the X -ray television or film examination.  (13) each pipe hydrostatic test pressure radial seal. Test pressure steel pipe pressure and time by computer testing device strictly controlled. Test parameters are automatically printed record.  (14) pipe end machining, so that the end vertical, blunt edge bevel and accurate control.

ASTM A252 standard covers nominal wall cylindrical steel pipe piles in which the steel cylinder acts as a permanent load-carrying member or as a shell to form cast-in-place concrete piles. Each welded pile shall be made by seamless, electric resistance welding, flash welding or fusion welding with longitudinal, helical-butt, or helical-lap seams. This specification also deals with material tensile requirements, minimum elongation values and common size and weights per unit length values.  SSAW pipe is made of hot rolled coiled steel by automatic submerged arc weld under normal atmospheric temperature. All the pipes are produced according to API Spec 5L, GB/T9711.1, GB/T9711.2, ASTM A252-89 standard. These pipes mainly used in petroleum and natural gas industry to transport flammable and non-flammable liquid and steel construction. O.D.:219-3040mm W.T.:5-30mm Steel Grade: ASTM A252 Grade1, Grade2, Grade3 Standard pipes and tubes for piles, columns, structural and other mechanical uses. Piling pipes for low-pressure, high-density purposes