Skin turning of billets 　　The steel billet is a process for removing the surface defects and scale of the round billet and processing the specified outer diameter and a certain surface finish. The turning amount and turning accuracy are determined by the diameter of the billet and the type of steel. The amount of turning is shown in Table 4-2. The amount of turning varies according to the conditions of each factory, and is roughly in the range of 3.5-15 mm. The turning amount increases as the diameter of the billet increases. Stainless steel has more surface defects than ordinary carbon steel and low alloy steel, and its turning amount is also larger.

The cut steel pipe is inspected according to technical requirements. The inspection includes checking the size and bending of each pipe and the quality of the inner and outer surfaces of the pipe, and sampling the mechanics and process performance, but the inspection requires sampling. The inspection of the geometrical dimensions and bending of the steel pipe can be carried out on the inspection table, or it can be continuously detected by an automatic size detecting device such as laser caliper, thickness measurement, and length measuring instrument.

Features of cold drawn precision steel pipe

The current cost of capital is down. Compared with the cost of capital that was priced at 1-2 a month last year, the borrowing costs of traders have now declined. Although the financial pressure has improved, the current economic outlook is not optimistic, and the seamless pipe in East China ,Small-diameter seamless steel pipes and seamless steel pipes are at a low level.

Stainless steel seamless pipe product features:

20# cold drawn seamless pipe spot resource specifications : 194*20 325*14

Some experts pointed out that 16Mn seamless steel pipe China faces unprecedented problems in environmental issues.

The high-pressure boiler tube is a kind of boiler tube. The high-pressure boiler tube is mainly used for manufacturing the superheater tube, the reheater tube, the air guiding tube and the main steam tube of the high pressure and ultra high pressure boiler. Belonging seamless steel tubes categories.

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.