Products News

December 2, 2021

Terms, definitions, symbols and abbreviations for tubing and casing

Terms, definitions, symbols and abbreviations 1.1 Terms and definitions This International Standard adopts the terms and definitions listed in the heat treatment operation section of ASTM A941 and below. 1.1.1 accessory material Seamless standard casing or oil pipe, seamless thick-walled pipe or mechanical pipe, bar material or hot forged material used in the manufacture of accessories. 1.1.2 API threads Thread specified in API Spec 5B. 1.1.3 Carload The quantity of steel pipes loaded on the first wagon delivered by the steel pipe manufacturer. 1.1.4 casing The pipe that extends from the ground surface into the well to line the well […]
November 24, 2021

What factors affect the performance of galvanized steel pipe

Galvanized steel pipes are welded steel pipes with a hot-dip galvanized or electro-galvanized layer on the surface. Galvanizing can increase the corrosion resistance of the steel pipe and prolong the service life. Galvanized pipe has a wide range of uses. In addition to line pipes for conveying water, gas, oil and other general low-pressure fluids, it is also used as oil well pipes and oil pipes in the petroleum industry, especially offshore oilfields, as well as oil heaters and condensation for chemical coking equipment. Pipes for coolers, coal-distilled wash oil exchangers, pipe piles for trestle bridges, and pipes for support […]
November 16, 2021

Introduction to basic knowledge of alloy structural steel

In addition to iron and carbon, steel is called alloy steel by adding other alloying elements. An iron-carbon alloy formed by adding an appropriate amount of one or more alloying elements on the basis of ordinary carbon steel. According to the different added elements and adopting appropriate processing technology, special properties such as high strength, high toughness, wear resistance, corrosion resistance, low temperature resistance, high temperature resistance, and non-magnetic properties can be obtained. The effects of the added elements are as follows: 1. Carbon (C): The carbon content in steel increases, the yield point and tensile strength increase, but the […]
November 8, 2021

Basic knowledge about oil pipeline

Basic knowledge about oil pipeline 1. Explanation of special terms related to petroleum pipeline API: It is the abbreviation of American Petroleum Institute in English, and Chinese means American Petroleum Institute. OCTG: It is the abbreviation of Oil Country Tubular Goods in English, which means special oil pipes in Chinese, including product oil casing, drill pipe, drill collar, coupling, short joint, etc. According to statistics, for every one meter drilled, about 62kg of oil well pipe is required, including 48kg of casing, 10kg of tubing, 3kg of drill pipe, and 0.5kg of drill collar. Tubing: The tubing used in oil […]
November 2, 2021

The difference between ERW, SSAW, LSAW

The production methods of seamless steel pipes are roughly divided into cross-rolling method (Mennesmann method) and extrusion method. The cross-rolling method (Mennesmann method) is to first pierce the tube blank with a cross-rolling roller, and then extend it with a rolling mill. This method has a fast production speed, but has high requirements on the machinability of the tube blank, and is mainly suitable for the production of carbon steel and low-alloy steel pipes. The extrusion method is to use a piercing machine to perforate the tube blank or steel ingot, and then use the extruder to extrude into a […]
October 26, 2021

45# seamless steel pipe

Production process of 45# seamless steel pipe The production process of 45# seamless steel pipe includes billet preparation before rolling, pipe billet heating, piercing, rolling, sizing and reduction, steel pipe cooling, steel pipe cutting head and tail, segmentation, straightening, flaw detection, manual inspection, and printing. , Bundle packaging and other basic processes. Nowadays, there are generally three main deformation processes in the production of hot-rolled seamless steel pipes: piercing, pipe rolling, and sizing and reducing. The respective process objectives and requirements are as follows. 1 perforation Perforation is to pierce a solid tube into a hollow capillary. The equipment is […]
October 20, 2021

Various common terms about steel

1. Standard Standards are unified regulations for repetitive things and concepts. It is based on the comprehensive results of science, technology, and practical experience, and is agreed upon by relevant parties, approved by the competent authority, and issued in a specific form as a standard and basis for mutual compliance. At present, the standards implemented by China’s steel products include national standards (CB, GB/T), industry standards (YB), local standards and corporate standards. 2. Technical conditions The various performance indicators and quality requirements that the product should meet in the standard are called technical conditions, such as chemical composition, external dimensions, […]
October 15, 2021

General term for steel pipe

General term   ①Delivery status    refers to the final plastic deformation or final heat treatment state of the delivered product. Generally, those delivered without heat treatment are called hot-rolled or cold-drawn (rolled) state or manufacturing state; those delivered after heat treatment are called heat-treated state, or normalized (normalized), quenched and tempered, solution, annealed according to the type of heat treatment state. When ordering, the delivery status must be indicated in the contract.   ②Delivery according to actual weight or theoretical weight    Actual weight-when delivered, the weight of the product is delivered according to the weighed (weighed) weight;   Theoretical weight-at the […]