Industry News

Degreasing methods and acceptance criteria for oxygen valves

The danger of contact between oxygen valves and lubricating grease was explained, and the necessity of degreasing oxygen valves was pointed out. Propose existing valve degreasing methods and compare their advantages and disadvantages, provide safety issues that need to be noted during the degreasing process, point out the methods for removing degreasing media, and finally provide acceptance standards for valve degreasing. 0. Introduction Oil evaporates in the air and the heat generated is quickly dissipated. Generally speaking, it is not easy for oil to collect heat and spontaneously combust. Pure oxygen is a strong oxidizing agent, and when oil is […]

2023-12-01

Connection method between valve and pipeline

The selection of the correct and appropriate connection method between valves and pipelines or equipment will directly affect the probability of pipeline and valve leakage. The common connection methods for valves include flange connection, clamp connection, butt welding connection, threaded connection, sleeve connection, clamp connection, self-sealing connection, and other connection forms. 1. Flange connection Flange connection refers to the installation of flanges on both ends of the valve body, corresponding to the flanges on the pipeline, and fixed in the pipeline through bolts. Flange connection is the most commonly used connection form in valves. There are three types of flanges: […]

2023-11-02

Valve supply requirements

General requirements of valves (1) Valves must be manufactured in accordance with their corresponding technical standards, design drawings, technical documents, and order contracts. Only after passing the inspection can the goods be supplied from the factory. (2) Special requirements should be specified in the order contract and inspected and supplied according to the specified requirements. (3) The manufacturer shall provide the products the user requires within the period specified in the contract. Coating and protection of valves (1) Except for austenitic stainless steel and copper valves, the nonmachined outer surfaces of other metal valves shall be painted or coated as specified in […]

2023-10-01

Steam Control Valve: A Comprehensive Guide to Operation and Selection

Steam control valves are essential components in various industrial processes that involve the use of steam. These valves enable operators to regulate the flow of steam with precision, allowing for optimal performance, energy efficiency, and safety. Steam control valves play a crucial role in various industrial processes where precise control of steam flow is essential for optimal performance and safety. This comprehensive guide will delve into the functioning, types, selection criteria, and maintenance of steam control valves. Whether you’re new to the field or seeking to enhance your understanding, this article will provide valuable insights. What is a steam control […]

2023-09-01

Selection of Welding Materials and Methods for Valve Sealing Surface Surfacing

What is surfacing? Surfacing belongs to the metal crystal combination of welding process methods, with the general characteristics of welding methods, but also has its special characteristics. Valve sealing surface surfacing cemented carbide enhances the sealing surface of the valve sealing surface to prevent leakage to extend the service life. The advantage of surfacing is that it can give full play to the performance advantages of the metal material, save material, and extend the service life of the parts. Valve sealing surface surfacing carbide process of the physical nature, metallurgical process, and the law of the thermal process is similar […]

2023-08-28

Analysis of cracking causes of Incoloy 825 valves

Introduced a company residue hydrotreating plant high-pressure water injection line Incoloy 825 valve body and welding bevel crack detection and analysis process, from the macro-inspection, chemical composition, metallurgical organization, mechanical testing, fracture, and energy spectrum analysis and other perspectives, discussed, analyzed the reasons for the failure of the Incoloy 825 valve cracking, put forward the corresponding measures to solve the problem. 1. Incoloy 825 valve main parameters A company residual oil hydrotreating unit Ⅱ series of intermittent injection line shut-off valve (specification DN80 1500LB, casting, valve body material Incoloy 825) in December 2014 inspection found that its butt weld has […]

2023-08-03

Forged steel flange gate valves: the first choice for high-quality industrial ……

Welcome to our comprehensive guide on forged steel flange gate valves, the superior choice for high-quality industrial equipment. In this article, we will delve into the features, benefits, and applications of these forged steel flange gate valves, highlighting their significance in various industries. If you are seeking robust and reliable solutions for your industrial needs, forged steel flange gate valves are undoubtedly the top choice. What is a forged steel flange gate valve? A forged steel flange gate valve is a special type that controls a pipeline’s fluid flow (liquid or gas). Its body is usually made of high-strength, highly […]

2023-07-03

Compilation method for American standard valve models

The valve industry has entered a period of global development today; The types and materials of American standard valve models are increasing, and the compilation of valve models is becoming increasingly complex; The standardization of American standard valve models provides convenience for the design, selection, and distribution of valves; The American standard valve model should usually indicate seven elements: American standard valve type, American standard valve driving method, American standard valve connection form, American standard valve structural characteristics, American standard valve nominal pressure, American standard valve sealing surface material, and American standard valve body material. There is no standard specification […]

2023-06-03

Analysis and Research on the Influence of Valve Flow Channel Structure on Flui……

Analyzed the influence of valve channel structure on the fluid flow state and flow resistance coefficient of the system, discussed the optimization design, experimental detection, and practical application of valve channel and throttling internal components, and introduced the calculation of flow resistance coefficient and pressure loss of typical valves. 1. Overview Valves are the main pressure pipeline components that transport fluids. In the process of fluid transportation, the structure of valve flow channels is closely related to the medium, flow rate, flow velocity, flow resistance, and pressure loss of the operating system, such as the structure of valve flow channels […]

2023-05-02

Key points of supervision in the manufacture of low temperature valves

Ultra low temperature valves and supporting devices are widely used in industrial enterprises such as electric power, petrochemical, and LNG. They have the characteristics of large usage, long manufacturing cycles, and complex process, making them difficult to supervise the manufacture of valve products. Based on the characteristics of low-temperature valve equipment manufacturing, this article expounds the supervision and control methods from four aspects: cryogenic treatment of raw materials and parts, normal temperature pressure test, and low-temperature test, and puts forward some suggestions for ensuring the quality, safety control, and orderly inspection of low-temperature valves. In recent years, China’s petroleum refining […]

2023-04-01

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Degreasing methods and acceptance criteria for oxygen valves

Connection method between valve and pipeline

Valve supply requirements

Steam Control Valve: A Comprehensive Guide to Operation and Selection

Selection of Welding Materials and Methods for Valve Sealing Surface Surfacing

Analysis of cracking causes of Incoloy 825 valves

Forged steel flange gate valves: the first choice for high-quality industrial ……

Compilation method for American standard valve models

Analysis and Research on the Influence of Valve Flow Channel Structure on Flui……

Key points of supervision in the manufacture of low temperature valves