Recently Shipment to Mid Asia Projects

Analysis of internal corrosion causes of product oil pipelines before they are……

Abstract: Corrosion failure analysis of a west-located product pipeline before putting into operation was carried out in terms of analyzing the inspection corrosion data and the pipeline conditions as well as the macro-morphology observation, microstructure examination, analysis of chemical composition and constituents of corrosion products by means of SEM, EDS and XRD. The results showed that due to the large variation of the pipeline elevation and the insufficient cleaning up of the hydrotest water, thus there existed residual water at some low points of the pipeline. Where, water-line corrosion might occur as a result of oxygen concentration difference cell formed […]

Recently Shipment to Mid Asia Projects

What are gate valves?

What are gate valves? Gate valves are gates with opening and closing parts. The movement direction of gate is perpendicular to the direction of fluid. Gate valve can only be fully opened and closed, and can not be adjusted and throttled. Gate valves are sealed by contact between the valve seat and gate plate. Metal materials are usually overlaid on the sealing surface to increase wear resistance, such as 1Cr13, STL6, stainless steel, etc. There are rigid gate and elastic gate. According to the difference of gate, gate valves are divided into rigid gate and elastic gate. Characteristics of gate […]

Recently Shipment to Mid Asia Projects

What is OCTG?

What is OCTG? Oil Country Tubular Goods (OCTG), is a collection of rolled metal products, more commonly known as drill pipe, casing and tubing which are manufactured according to API specification. It used both onshore and offshoreiIn petroleum industry. Oil Country Tubular Goods are used both onshore and offshore. In the industry, they are also referred to by the acronym OCTG (for “Oil Country Tubular Goods”). Drill pipe is heavy seamless tube that rotates the drill bit and circulates drilling fluid. Pipe segments 30 ft (9m) long are coupled with tool joints. Drill pipe is simultaneously subjected to high torque […]

Recently Shipment to Mid Asia Projects

Ferritic stainless steel forging & austenitic stainless steel forging

Basic knowledge of ferritic stainless steel forging Characteristics of ferritic stainless steel forging Types of Ferritic Stainless Steel Chemcial Composition of Ferritic Stainless Steel Mechanical Properties of Ferritic Stainless Steel Physical Properties of Ferritic Stainless Steel Applications of Ferritic Stainless Steel Austenitic stainless steel Characteristics of austenitic stainless steel forging Applications of austenitic stainless steel Pure chromium ferritic stainless steel has no significant increase in hardness after quenching. During the forging process, work hardening will occur and the hardening degree varies with temperature and shape variables. This kind of steel has no rigorous requirement for the cooling temperature after forging. […]

Recently Shipment to Mid Asia Projects

Five Technical Requirements for Flange Forging Process

The use conditions of flanges refer to the importance, working conditions, assembly and disassembly difficulty, complexity of them, as well as force, working temperature, corrosion degree, and other factors. From the basic principle that the forging is to serve and meet the use conditions of the parts, the technical requirements of the forging should include two aspects, one is the requirements of the shape, size and surface of the forgings, and the other is the requirements of structure and mechanical performance. The key to meeting the requirements of forgings is correctly selecting the raw materials, and strictly controlling the production […]

Recently Shipment to Mid Asia Projects

What is an elbow?

What is an elbow? The steel elbow is a kind of connecting pipe commonly used in pipe installation. It connects two pipes with the same or different nominal diameters to make the pipe turn at a certain angle. According to the angle, there are three most commonly used 45° and 90°180°, and other abnormal angle elbows such as 60° are also included according to engineering needs . A bending radius of less than or equal to 1.5 times the diameter of the pipe belongs to the elbow, and 1.5 times larger than the pipe diameter belongs to theelbow . Elbows are made of cast iron, stainless steel, alloy steel, malleable […]

Recently Shipment to Mid Asia Projects

Sealing form of forged valve and its sealing performance

Seals will also be a vital component in forged valves. The sealing performance of the forged valve means ability of the sealing parts of the cast valve to stop the leakage in the medium. It is an essential technical performance index in the forged valve. You can find three sealing elements of the cast valve: This is the contact between your sealing surfaces with the frequent lowering and raising member as well as the valve seat the joint with the packing together with the valve stem along with the stuffing box the text between your forged valve body and the […]

Recently Shipment to Mid Asia Projects

Pressure test method and precautions for valves

In chemical production, as long as there is fluid, the valve will be used. The importance of the valve in the chemical industry is self-evident. So today, Yikong Jun will discuss with you the pressure test methods and precautions for common valves. Commonly used media for valve pressure test are water, oil, air, steam, nitrogen, etc. The pressure test methods for various industrial valves with pneumatic valves are as follows: 1 Shut-off valve and throttle valve For the strength test of the stop valve and the throttle valve, usually put the assembled valve in the pressure test frame, open the […]

Recently Shipment to Mid Asia Projects

Experimental study on corrosion of ductile iron water supply pipe

The tap water corrosion of ductile cast iron for water-supply pipe (DCIWP) is studied by means of electrochemical method and mass loss method. Taking into account the effects of initial corrosion on the correctness of the experimental results, a mass loss test including a period of pre-corrosion is conducted to study the main influence factors for the corrosion process through the orthogonal test design. The result turns out that at first the corrosion rate of the iron fluctuates significantly, then declines gradually over time and becomes stable in 48 h finally. The influence of pH of the water and test […]

Recently Shipment to Mid Asia Projects

Effect of post-forging heat treatment on stress corrosion behavior of nuclear ……

Effect of post solution- and stress relief-treatment on the stress corrosion cracking (SCC) resistance via U-bend specimens test in 42% boiling MgCl2 solution, as well as the microstructure, residual strain and mechanical properties of the forged 316LN stainless steel was studied. Results showed that the yield stress was reduced and the residual strain was eliminated through post solution-treatment for the forged steel. After immersion in boiling MgCl2 solution for 24, 48 and 72 h, respectively, all the U-bend specimens of either the solution-treated or the stress relief-treated steels suffered from clearly transgranular stress corrosion cracking (TGSCC). Furthermore, of which all the stress […]

العربيةБългарски简体中文繁體中文DanskNederlandsEnglishFrançaisDeutschBahasa IndonesiaItaliano日本語한국어LatinPortuguêsРусскийEspañolதமிழ்ไทยTürkçe