The tubing in the oil casing is a pipeline that transports crude oil and natural gas from the oil and gas layer to the surface after the drilling is completed.

Stainless steel welded pipe standard

Steel-plastic composite pipe, large-diameter coated steel pipe

Spiral steel pipe production process: It is a spiral seam steel pipe welded by automatic double-wire double-sided submerged arc welding with strip steel coils as raw materials, often extruded and formed.

Welded pipes are divided into spiral welded pipes and longitudinally welded steel pipes according to the forming process, and high-frequency resistance welding and submerged arc welding according to the welding process. Spiral welded pipes all adopt submerged arc welding process. For longitudinally welded pipes, submerged arc welded pipes are referred to as UOE, and longitudinal high-frequency resistance welding is referred to as ERW.　

Stainless steel composite steel pipe

Seamless steel pipe

Alloy tube specification table

Spiral welded steel pipes refer to steel pipes with seams on the surface that are welded by steel strips or steel plates that are bent into round or square shapes.

Las tuberías de revestimiento de petróleo se utilizan para soportar las paredes de los pozos de petróleo y gas, asegurando el funcionamiento adecuado del pozo durante la perforación y después de su finalización. Hay dos tipos principales de tubos de acero que se utilizan para revestimientos de petróleo: revestimiento sin costura y revestimiento ERW. Aquí hay una comparación detallada entre ellos.

High-frequency welded pipes are generally completed through processes such as cold rolling, high-frequency welding, and forming. It is a kind of seamed tube.

Ship Duilding tube specification table

Welded steel pipes refer to steel pipes with seams on the surface that are welded after bending and deforming steel strips or steel plates into round or square shapes. The production process of welded steel pipes is simple, the production efficiency is high, the steel pipes have many varieties and specifications, and the equipment is less, but the general strength is lower than seamless steel pipes. Since the 1930s, with the rapid development of high-quality strip continuous rolling production and the advancement of welding and inspection technology, the quality of welds has been continuously improved, and the variety and specifications of welded steel pipes have increased, and they have replaced non-products in more and more fields. Seam the steel pipe.

Choose to buy stainless steel pipes 1. Identify whether the steel stamped material "304" is printed on the surface of the pipe, and obtain the stainless steel pipe manufacturer's quality certificate and quality assurance certificate.

Cr5Mo alloy tube Average carbon content: 0.15%, chromium content: 4.00～6.00%, molybdenum content: 0.45～0.60%.

Welded pipe: the specification is in the form of seamless pipe, welded steel pipe expressed by outer diameter * wall thickness in millimeters, and metric welded pipe is welded with ordinary carbon steel, high-quality carbon steel or general energy low-alloy steel in the hot zone, cold zone, or hot zone Cold drawing method after welding

Shaped seamless steel pipe is a general term for seamless steel pipes with cross-sectional shapes other than round pipes.

The biggest difference between high frequency resistance welded pipe (Electric Resistance Welding, ERW) and seamless steel pipe is that ERW has a weld, which is also the key to the quality of ERW steel pipe.

Knowledge of steel pipe and square steel specifications, models and weight tables

Welded steel pipe weight

Flange is a disc-shaped part, which is the most common in pipeline engineering. Flanges are used in pairs. In pipeline engineering, flanges are mainly used for the connection of steel pipes. In the pipelines that need to be connected, a flange plate is installed in various ways. The low-pressure pipeline can use the wire flange, and the welding flange is used for the pressure above 4 kg. Add a sealing point between the two flanges, and then tighten them with bolts. Flanges with different pressures have different thicknesses and use different bolts. When water pumps and valves are connected to pipelines, parts of these equipment and equipment are also made into corresponding flange shapes, also known as flange connections. All connecting parts that are connected by bolts on the two planes and are closed at the same time are generally called "flanges", such as the connection of ventilation pipes. This type of parts can be called "flange parts". But this kind of connection is only a part of the equipment, such as the connection between the flange and the water pump, it is not good to call the water pump "flange parts". Smaller ones, such as valves, can be called "flange parts".