Thick-walled seamless steel pipeStructural tube GB />The reliability of several non-destructive testing methods for magnetic flux leakage, eddy current, ultrasonic and electromagnetic ultrasonic used in flaw detection is discussed. It can be seen from the comparison of the reliability of the above methods that electromagnetic ultrasonic method has advantages that are incomparable to other non-destructive testing methods. And broad application prospects.

Demand for steel in the domestic market is weak. At the same time, the growth rate of the main steel industry continued to decline. Steel production adhered to a high level, and the steel market still showed a situation of oversupply, so steel prices continued to fall in May.

The steel market last week was running at 4,300 yuan / ton, depending on the variety. A slight rebound in the third consecutive day, a half weeks after the 20th seamless steel pipe but still slightly lower than the previous week.

Structure with a seamless sizes of Name Value

We often say that the use of galvanized pipes and galvanized pipes is also the type of iron pipe used for gas and heating. It is also a galvanized pipe.

Class-based Class I Ⅱ Ⅲ level design pressure / MPa design temperature / ℃ Design pressure / MPa design temperature / ℃ Design pressure / MPa design temperature / ℃ > ≤ steam and hot oil 1.6 300 O. 7～1.6 170～300 0.7 170 fuel 1.6 150 O. 7 to 1.6 60 to 150 O. 7 60 other media 4. O 300 1.6~4. O 200～300 1.6 200

ABS alloy tube and special cold-melt adhesive are one of them. ABS alloy tube is widely used in building water supply and central air-conditioning. It is especially used in building water supply riser and central air-conditioning pipe. It can also be used to make automobile exterior parts. Such as car wheel covers, mirror housings, taillight covers, etc. PC/ABS has good formability and can process large parts of automobiles, such as car fenders.

Spiral Welded Pipe Weld Classification

　Manufacturing process of thick-walled steel pipe thick-walled steel pipe seamless steel pipe:

The casing is a large diameter pipe that acts as a wall or well for oil and gas oil wells. The casing is inserted into the wellbore and fixed with cement to prevent the wellbore from separating the formation and the wellbore from collapsing, and to ensure that the drilling mud circulates for drilling. Different types of casing used in oil extraction:

Round steel is a solid strip of steel with a circular cross section.

Pipe geometry and appearance tests: ① check pipe wall thickness: micrometer, ultrasonic thickness gauge, the two ends of not less than 8:00 and recorded. 2 Steel pipe outer diameter , ovality inspection: caliper, vernier caliper, ring gauge, measuring the maximum point, the minimum point. 3 steel pipe length inspection: steel tape measure, manual, automatic length measurement. 4 steel pipe bending inspection: ruler, level (1m), feeler gauge, thin line measurement per meter bending, full-length bending. 5 steel pipe end groove angle and blunt edge inspection: square feet, card board.

1. Production process of 8163 fluid pipe u The general boiler tube use temperature is below 450 °C, and the domestic tube is mainly made of 10 or 20 carbon steel hot-rolled tubes or cold drawn tubes.

With the continuous development of process technology, the quality of stainless steel pipe is constantly improving, making it more and more recognized in the process of use. At the same time, people have raised higher requirements, and hope that they will continue to improve in terms of quality and make breakthroughs in performance. Therefore, the development and application of new steel pipe is very necessary.

The anti-corrosion steel pipe is directed to the three processes of electrochemical corrosion of the buried pipeline, and the anti-corrosion method of the steel pipe also starts from suppressing one of the processes.

High pressure boiler tubes 20G to ASTM SA106B / C to ASTM SA210A / C ST45.8-III GB5310-2008 to ASTM SA106 to ASTM SA210

Main characteristics of 30CrMo steel pipe seamless steel This steel has high strength and toughness, high hardenability, and critical hardenable diameter in oil is 15~70mm; steel has good thermal strength, and has sufficient high temperature below 500 °C. Strength, but its strength drops significantly at 550 °C;

Main features of LSAW steel pipe: 1) The steel pipe has a longitudinal weld, and the inner and outer welds are welded by a submerged arc welding.

The thermal conductivity of polyurethane is: λ=0.013—0.03kcal/m·h·oC, which is much lower than other commonly used pipe insulation materials, and the thermal insulation effect is improved by 4~9 times. Further, its water absorption rate is very low, about 0.2 kg/m2. The reason for the low water absorption rate is that the closed cell ratio of the polyurethane foam is as high as about 92%. The low thermal conductivity and low water absorption, plus the high-density polyethylene or FRP protective shell with good insulation and outer waterproofing, change the condition of the traditional ditch laying heating pipe “wet cotton quilting”, greatly reducing the heating pipe. The overall heat loss, heat network heat loss is 2%, far less than the international standard of 10%. 2, low heat loss, energy conservation According to the calculation of the relevant departments, under normal circumstances, polyurethane insulation steel pipe can reduce the project cost of 25% (using FRP as a protective layer) and 10% (using high-density polyethylene as a protective layer). 1. Reducing the advantages of engineering cost polyurethane insulation pipe:

What is LSAW pipe means LSAW (Longitudinal double submerge arc welding) carbon steel pipe is a type of SAW pipe made of steel plates that were hot rolled by JCOE or UOE forming technology. JCOE technology represents the shaping and forming processes involved during manufacturing as well as the inner and outer welding and cold expansion carried out after welding.

Sour services steel pipe is applied for pipelines in the corrosive environment. As we know, line pipe corrosion is an important factor affecting its safety service and service life. It will cause the leakage of oil and gas pipeline, some cases even explosion. Pipe corrosion has a big threaten to personal safety and environment pollution, so the production of sour service pipe is important. At present, the manufacture inspection standard for acid pipe mainly according to API Spec 5L.