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A335 P12 A369 FP12 A213 T12 high pressure steel pipe quality assurance
A335 P12 steel pipe is a kind of seamless steel pipe, and its performance is much higher than that of ordinary seamless steel pipe.
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A106gr.B seamless steel pipe manufacturer direct sales
ASTM A106 seamless steel pipe belongs to American standard steel pipe, including a106-a and a106-b. The former is equivalent to the domestic 10# material, and the latter is equivalent to the domestic 20# material.
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Production of various precision bright tubes
Precision pipe is a kind of seamless steel pipe with high precision and high brightness produced by cold drawing or cold rolling process. Its internal and external diameter can be accurate to within 0.2mm.
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4135 34crmo4 35CD4 alloy steel pipe manufacturer spot warranty sales
ASTM 4135 has high static strength, impact toughness and higher fatigue limit, higher hardenability than 40Cr, high creep strength and endurance strength at high temperature, long-term working temperature up to 500℃; plasticity during cold deformation Medium, poor weldability.
Foreign name ASTM 4135 alloy structural steel 4135
Alloy structural steel: 4135
Executive standard: ASTM A29/A29M-04
●Characteristics and scope of application:
It has high static strength, impact toughness and higher fatigue limit, higher hardenability than 40Cr, high creep strength and endurance strength at high temperature, long-term working temperature up to 500℃; medium plasticity during cold deformation, Poor weldability. Used as important structural parts that work under high loads, such as transmission parts of vehicles and engines; rotors, main shafts, heavy-load transmission shafts of steam turbine generators, and large-section parts.
●Chemical composition:
Carbon C: 0.33～0.38
Silicon Si: 0.15～0.35
Manganese Mn: 0.70～0.90
Sulfur S: allowable residual content ≤0.040
Phosphorus P: allowable residual content ≤0.035
Chromium Cr: 0.80～1.10
Nickel Ni: allowable residual content ≤0.030
Copper Cu: allowable residual content ≤0.030
Molybdenum Mo: 0.15～0.25
●Mechanical properties:
Tensile strength σb (MPa): ≥985(100)
Yield strength σs (MPa): ≥835(85)
Elongation δ5 (%): ≥12
Reduction of area ψ (%): ≥45
Impact energy Akv (J): ≥63
Impact toughness value αkv (J/cm2): ≥78(8)
Hardness: ≤229HB
Sample size: sample blank size is 25mm
●Heat treatment specifications and metallographic structure:
Heat treatment specification: quenching 850℃, oil cooling; tempering 550℃, water cooling, oil cooling.
●Delivery status: delivery with heat treatment (normalizing, annealing or high temperature tempering) or without heat treatment. The delivery status should be indicated in the contract. [1-2]
●Corresponding national brands:
Corresponding domestic grades: 35CrMo
Corresponding Japanese brand: SCM435 (SCM3)
Corresponding to German brand: 34CrMo4(1.7220)
Corresponding British grades: 708A37
Corresponding French brand: 35CD4 -
Small diameter steel pipe manufacturer
The production and manufacturing process of small-diameter thick wall seamless steel pipe can be divided into four basic modes: cold drawing, cold rolling, hot rolling and hot expansion.
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China thermal insulation steel pipe factory
Heat preservation pipe is a steel pipe that is processed by heat preservation process to ensure that the internal temperature and surface temperature of the working steel pipe meet or meet the service requirements under the action of different working environment and external media.
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SA210C A53 A106GR.B A106C A178 seamless steel pipe
A106 seamless steel pipe is a seamless steel pipe used to transport high-temperature fluids such as water, oil, and gas.
American Standard ASTM A106-ASME SA106 is used to transport high temperature fluids such as water, oil and gas. A106A, A106B, A106C A106gr.b
High-pressure seamless steel pipes and high-pressure boiler pipes are a type of boiler pipe and belong to the category of seamless steel pipes. The manufacturing method is the same as that of seamless pipes, but there are strict requirements on the steel grades used in the manufacture of steel pipes. High-pressure boiler tubes are often in high-temperature and high-pressure conditions when they are used. High-pressure boiler tubes are mainly used to make superheater tubes, reheater tubes, air ducts, main steam tubes, etc. for high-pressure and ultra-high-pressure boilers. The requirements for installation of high-pressure pipelines are similar to those for installation of medium and low-pressure pipelines, but the requirements are higher and the regulations are stricter. Therefore, in addition to meeting the requirements for installation of medium and low-pressure pipelines, the following requirements should be implemented.
High-pressure seamless steel pipe is a kind of seamless pipe. The manufacturing method is the same as that of seamless pipes, but there are strict requirements on the steel grades used in the manufacture of steel pipes. According to the operating temperature, it can be divided into general boiler tubes and high-pressure boiler tubes.
① The service temperature of high-pressure seamless steel pipes is below 450℃. Domestic pipes are mainly made of No. 10 and No. 20 carbon steel hot-rolled pipes or cold-drawn pipes.
② High-pressure seamless steel pipes are often used in high temperature and high pressure conditions, and the pipes will be oxidized and corroded under the action of high-temperature flue gas and water vapor. The steel pipe is required to have high durable strength, high oxidation and corrosion resistance, and good organizational stability.
The high-pressure pipe sections, pipe fittings, fasteners and valves used for installation must be inspected and qualified with corresponding technical certification documents. After being shipped to the site, they should be properly kept, marked clearly, and placed neatly. Before installation, the inner and outer surfaces should be wiped clean, and at the same time, check whether there is any foreign matter in the inner passage and whether it is unblocked. Check whether the roughness of the sealing surface of the nozzle and the gasket meets the requirements. There should be no scratches (especially radial scratches), spots and other defects that affect the sealing performance on the sealing surface. The sealing surface of the mouth and the gasket are coated with engine oil or butter or white petroleum jelly for protection. The threaded part of the pipe end of the high-pressure pipe that has passed the inspection shall be protected by a blend of molybdenum disulfide grease or graphite oil, except for the specified degreasing pipe.
When the pipeline is installed, it should be fixed with a formal pipe rack, and the pipe rack in contact with high-pressure pipes and pipe fittings should be installed with protective sleeves according to the design requirements. When installing the high-pressure flange, the chamfer of the pipe end thread should be exposed. When installing the gasket, do not hang it with metal wire. Grease the nozzle and gasket beforehand. The soft metal high-pressure gasket should be accurately placed in the sealing seat. Flange bolts should be tightened symmetrically and evenly, without excessive. After the bolts are tightened, the two flanges should be parallel and concentric. The exposed length is basically the same. During the installation process, do not use methods such as strong pulling, pushing, twisting or modifying the thickness of the gasket to make up for manufacturing or installation errors. If the pipeline installation work cannot be carried out and completed continuously, the open nozzles should be closed in time. The parts of the instrument sampling location on the pipeline should be installed at the same time as the pipeline. -
Stainless steel pipe stock specifications are complete
Stainless steel pipes are divided into ordinary carbon steel pipes, high-quality carbon structural steel pipes, alloy structural pipes, alloy steel pipes, bearing steel pipes, stainless steel pipes, bimetallic composite pipes, coated and coated pipes to save precious metals and meet special requirements. Stainless steel pipes have a wide variety, different uses, different technical requirements and different production methods.
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TP321 stainless steel pipe genuine spot
Seamless steel pipe (GB14976-2002) is a high-quality carbon structural steel hot-rolled and cold drawn (rolled) seamless steel pipe for manufacturing superheated steam pipe, boiling water pipe of low and medium pressure boiler and superheated steam pipe, large smoke pipe, small smoke pipe and arch brick pipe for locomotive boiler.
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China STPA23 G3458 A199T11 high temperature pressure pipe manufacturer
ASME material, seamless steel pipe. It is mainly used for heating surface components such as economizer and water wall in boiler pressure components; The corresponding domestic material is SA210 / gb5310. The service temperature is generally lower than 450 ℃.
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High pressure steel pipe manufacturer’s warranty
Genuine high-pressure steel pipe of large factory is of high quality and low price
High pressure steel pipe is a high-quality carbon steel, alloy structural steel and stainless steel seamless steel pipe used to manufacture high-pressure vessels and pipes.
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Rectangular tubes are widely used
Common materials of welded square pipes are: Q235A, Q235C, Q235B, 16Mn, 20#, Q345, L245, L290, X42, X46, X60, X80, 0Cr13, 1Cr17, 00cr19ni11, 1Cr18Ni9, 0cr18ni11nb, etc.
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