Dmh United de acero a lo largo de los años, proporcionando a los clientes la calidad de aceite de petróleo, tubos y estructura de tubos de acero sin soldadura, fluido de tubos de acero sin soldadura, productos de alta calidad y bajo precio, bienvenido a los clientes de la compra. Cubierta de petróleo

API 5L/A53 GR.B, ERW Steel Pipe ​​

ASTM A178 is for electric-resistance-welded carbon steel and carbon-manganese steel boiler and superheater tubes

Manufacture of Hot-Dip Zinc Coating Fasteners according to ASTM A153 / ASTM A153M ASTM A153 / A153M - 09 Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware

ASTM A53 contains seamless steel pipe and welded steel pipe black and hot-dipped galvanized steel pipe in NPS 1/8 to NPS 26. The steel categorized in this standard must be open-hearth, basic-oxygen or electric-furnace processed and must have the following chemical requirements: carbon, manganese, phosphorus, sulfur, copper, nickel, chromium, molybdenum, and vanadium. The tubing shall undergo a seamless or welding process. Tension, bend, and flattening tests shall be performed to make sure that it must adhere to the mechanical properties of the standard.

API 5L is a standard of API 5L line pipe. Specifications for API 5L adhere to the International Organization for Standardization ISO 3183. The API 5L specification provides standards for pipe suitable for use in conveying gas, water, and oil in the natural gas and oil industries. The API SPEC 5L covers seamless and welded steel line pipe. It includes standard-weight and extra-strong threaded line pipe; and standard-weight plain-end, regular-weight plain-end, special plain-end, extra-strong plain-end, special plain-end, extra-strong plain-end pipe, as as well as bell and spigot and through-the-flow line(TFL) pipe.

Through these two years, the steel pipe industry, the cumulative market price rose as much as 1,500-2800 yuan / ton, from 2000-3000 yuan / ton before 2016, violently rose to 4000-6000 yuan / ton, one can imagine the speed Still amazing. However, the high level of the industry did not continue to open. The downturn of the real estate industry and the retrenchment of investment in infrastructure construction and the cautious macroeconomic stimulation all inhibited the progress of the steel pipe to a certain extent. For 2018, to maintain the high level of 2017 is already a success. If we want to brush the record again, we will not only need to make changes in our own industries but will also need the impetus from the external environment.

With the continuous structural reform of the supply side, the steel industry related metal products industry, including the steel pipe industry, has been brewing a good trend recently, but the real turning point of the relevant industries has not yet come. According to statistics, after nearly a decade of development, China's steel pipe industry has been continuously optimized and upgraded in terms of product structure, quality level, technical equipment and so on. It has become a veritable world steel pipe manufacturing powerhouse and is now making its stride in the world's steel pipe industry. However, the staged contradictions and structural contradictions in the development of China's steel pipe industry have emerged as a "bottleneck" that hinders the sustainable, healthy and stable development of the steel pipe industry. The depth adjustment of the steel pipe industry is still under way.

Main Reasons Those Affect The Quality of Pipe Bend

welded steel pipe,ERW steel pipe,SSAW steel pipe,LSAW steel pipe

Hollow Sections Sizes( square and rectangular tube)

Steel Pipe Lengths

Steel Pipe Size

After completion of welding, pipe roundness and straightness often can not meet the relevant standards and technical requirements, sizing and fixed straightness is used pipe plant, cold bulged by mechanical methods to complete.

Cold forming is without heating the material punching, bending, stretching and other processing methods. Cold forming processes are cold forging, cold rolling, forging and so on.

LSAW STEEL PIPE ( FOB BASIS) CURRENCY USD

ASTM A106 belongs to the American standard, which contains steel grade: Gr.A; Gr.B; Gr.C. ASTM A106 standard specification for seamless carbon steel pipe for high-remperature service.

Spiral steel pipe used as a bridge type of steel pipe welding, production should find the best welding method for it in order to improve the production efficiency of spiral steel pipe.

ASTM material standards are developed by the American Society for Materials and Testing, ASTM material standards can include the chemical, mechanical, physical and electrical properties of the material. These standards include both a description of test methods to be performed on building materials, and the size and shape that these materials are to take. Building materials like concrete can be required by local law to meet ASTM standards before being used in construction. Among ASTM A53 and ASTM A106 are widely used. ​

ASTM A335 / A335M - 11 Standard Specification for Seamless Ferritic Alloy Steel Pipe for High-Temperature Service

For the ASTM standard, different material with different steel grade,besides, their mechanical properties and chemical composition, metallurgical properties are all different.