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Research on Generalization of Forged Steel Hydrogenation Valve Bodies Based on the Finite Element

Abstract: Aiming at the problems of high manufacturing costs and long production cycles of forged steel hydrogenation valve bodies, take two Y-shaped forged steel globe valves with a diameter of 10IN and pressure of 1500LB and 2500LB as an example. Universal and innovative design is carried out for the forged steel valve bodies with the same diameter and different pressure. The finite element analysis software Patran is used for the static analysis, and the...

Design and Research of Forged Slab Gate Valves without Welding Seams

Forged slab gate valves without welding seams made from nickel alloy 625 with pressure of Class 900 and 15% of H2S content in the medium have advantages under conditions of high requirements and strong corrosion. They have good practicability and operability in practical applications, and bright prospects of the market promotion. 1. Overall structure The main parts of the forged slab gate valve without welding seams, such as the valve...

An Introduction to a Forged Steel Ball Valve

The features and applications of a forged steel ball valve A forged steel ball valve has features of good performance, good reliability, wide ranges of applications and reasonable prices. It can be classified into low-pressure forged steel ball valves and high-pressure forged steel ball valves. A forged steel ball valve is applied to chemical, petroleum, natural gas, metallurgy and long-distance natural gas pipelines containing hydrogen sulfide, many...

The Connection Ends and Maintenance of the Forged Steel Valve

Most of the forged steel valves have flange ends, and there are the following types according to the shape of the connecting surface: 1. Lubrication types: they are used for forged steel valves with low pressure, and the processing is convenient. 2. Concave-convex types: the operating pressure is high, and gaskets with medium hardness or good hardness can be used. 3. Tongue and groove types: gaskets with great plastic deformation can be used, which are...

Processing Oblique Channels of Forged Steel Globe Valve Bodies (Part Two)

3. The structure of positioning fixture (1) The structure of the fixture The optimized positioning fixture is composed of a mold, a positioning screw, a nut, a pressure plate, a spacer block, a T-slot screw, etc. (Figure 3) (2) The principle of clamping The centerline of the two channels of the valve body is parallel to that of the spindle of the machine tool through the inclined surface of the mold, and the channel at one end of the valve body is matched with the eccentric port by the eccentric...

Processing Oblique Channels of Forged Steel Globe Valve Bodies (Part One)

Abstract: The structural characteristics of the oblique channel of the high-pressure forged steel globe valve body and its processing method are discussed in this article, and the contrast analysis is carried out in aspects such as the processing accuracy, processing range, and processing efficiency. Through the conclusions drawn, the positioning fixture of the lathe is optimized and improved. According to the type and characteristics of the machine tool equipment, economical and applicable processing...

The Machining of Oblique Holes of Forged Steel Globe Valve Bodies

The compact forged steel globe valve has small sizes, light weights, good strength and reasonable structure, which is welcomed by users. The machining processes of the globe valve body (Figure 1) are as follows: die forging valves → heat treatment → shot blasting → inspection → machining middle flange planes, seam allowance and middle holes → machining both end faces, socket and flow holes → drilling the flange bolt holes of middle flanges → drilling the oblique...

Stellite Alloy Surfacing Repair Processes of 15CrMo Forged Gate Valves (Part Three)

3.1.3 Intelligent temperature control The temperature rise rate should not exceed 70℃/h to avoid the partial excessive temperature of the valve body and valve seat, which will affect the deformation of the valve body. After it exceeds 300°C, the heating rate is allowed to be appropriately reduced. When the temperature rises to about 370°C, you can weld the parts that need surfacing after heat preserving for about 2 hours. The schematic diagram of the...

Stellite Alloy Surfacing Repair Processes of 15CrMo Forged Gate Valves (Part Two)

2. Technical difficulties of on-site repair of gate valve seats 2.1 Characteristics of materials of valve seats The surfacing material of the gate valve seat is Stellite6. It belongs to the Co-Cr-W-C series of alloys, which is a classic series of Stellite alloys. It is characterized by small alloying elements and high carbon content. This series of alloys have good hardness, good wear resistance, good temperature resistance and cavitation resistance, and poor toughness. The...

Stellite Alloy Surfacing Repair Processes of 15CrMo Forged Gate Valves (Part One)

The common damage types of valve seats and mechanisms are introduced based on the structural characteristics of the sealing surface of the gate valve seat. The characteristics of the surfacing material Stellite alloy and the base material 15CrMo and the difficulties in surfacing repair are analyzed. The process of surfacing welding repair is introduced in detail, including preparation before welding, alloy surface surfacing, and surfacing welding surface processing....

Analysis of Tooling for Guide Grooves of Forged Valve Bodies' Wedges

Abstract: The problems existing in the processing of the traditional guide grooves of wedges are analyzed, and the structure and working principles of the new tooling are introduced in this article. 1. Overview Gate valves are widely used in petrochemical and other pipelines to control the medium in the pipeline. They have the characteristics of small flow resistance, flexible opening and closing, long life, compact structure, safety and reliability. The guide groove on the valve body of...

The Processing of Guide Grooves of Forged Steel Gate Valves' Wedges

Abstract The production efficiency of the forged steel gate valve's wedge is improved by improving the processing method of guide grooves of the forged steel gate valve's wedges. A forged steel gate valve is used to connect and stop the flow in the pipeline. A forged steel gate valve is widely used in water, oil, natural gas, food and other industries due to its characteristics of low flow resistance, flexible opening and closing,...

Matters Related to Forged Steel Flanged Gate Valves

Forged steel flanged gate valves The bonnet of the forged steel flanged gate valve is divided into three types: bolted bonnets, welded bonnets, and pressure self-tightening bonnets. This kind of valve has the main feature of having rising stems with brackets, and the integral valve body is a flange. The flat-bottomed valve seat design reduces the fluid pressure and makes the flow smooth, which makes the valve widely used as a regulating and intercepting device on fluid pipelines...

Optimization of Surfacing Welding of Forged Steel Valve Bodies (Part Two)

2.2 The results of penetrant inspection A gas hole is found on the surfacing surfaces of samples 1, 2, 3 and 5 of forged steel valves, and there are many slag inclusions for the sample 2. The sample 3 has a small amount of slag inclusions. There are gas holes on the surfacing surface for the sample 4. Samples between 6 and 10 as well as 14 have defects on their surfacing surfaces. Cracks are found on the surfacing surfaces of the samples 11, 12, 13 and 15. A lot of slag inclusions were found...

Optimization of Surfacing Welding of Forged Steel Valve Bodies (Part One)

Abstract: Given that gas holes, cracks and other defects often appear in the surfacing of the sealing surface of the small-diameter forged steel valve body, we focus on the current, voltage and surfacing surface height to analyze the influences of their changes on the quality of the surfacing surface. Find out the law of defects, hardness and structure composition with parameters by analyzing surface observation, hardness inspection and metallographic tests, and...

Development of High-pressure Forged Steel Gate Valves for Hydrogenation Equipment (Part Three)

5.3 The sealing packing system In order to ensure the reliability of dynamic sealing of the valve stem packing, the spring-loaded, double packing seal structure shown in the Figure 4 was designed, and a leakage tube was added in the middle of the double packing. The packing consists of two sets of V-shaped graphite plus upper and lower braided graphite to form a double seal. The butterfly spring loading force of the bottom packing is 1.1 times higher than the nominal medium pressure generating...

Development of High-pressure Forged Steel Gate Valves for Hydrogenation Equipment (Part Two)

Table 1 Selection of main body materials and internal materials Valve bodies ASTM A216 WCB/ ASTM A105 ASTM A217 WC6/ ASTM A182 F11 CL2 ASTM A351 CF8C/ASTM A182 F321, F347 Packing gaskets ASTM A105 ASTM A182 F11 CL2 ASTM A182 F321, F347 Valve seats ASTM A105 plus S116 ASTM A182 F11 CL2 plus STL6 ASTM A182 F321, F347 plus STL6 Valve discs ASTM A216 WCB plus STL6/ASTM A105+STL6 ASTM A217 WC6 plus STL6/ASTM...

Development of High-pressure Forged Steel Gate Valves for Hydrogenation Equipment (Part One)

Abstract: The design of key components such as the general structure of the valve body, sealing packing system and sealing packing detection system are carried out in view of working conditions, design and development difficulties of high-pressure forged steel gate valves for hydrogenation equipment; key processes such as receiving inspection of raw materials, welding processing and matching design of sealing test equipment are controlled. The results of the pressure test...

Knowledge of Forged Steel Cryogenic Globe Valves

Material selection of forged steel cryogenic globe valves Selection of materials for gaskets and packing of forged steel cryogenic globe valves: As the temperature drops, the fluoroplastics shorten greatly, which will result in a decline in the sealing function and cause leakages. Asbestos packing cannot prevent permeability leakages. Rubber has swelling properties to LNG and cannot be used at low temperatures. Selection of valve bonnets of cryogenic globe valves: long...

An Introduction to Forged Steel Ball Valves

Applications of forged steel ball valves Forged steel ball valves are widely used valve products in many industries. They are widely used for air, water, steam, various corrosive media, slurry, oils, liquid metal and radioactive media due to their excellent performance. Advantages of forged steel ball valves The advantages of forged steel ball valves are as follows: 1. Forged steel ball valves have very good resistance to vulcanization and cracking. The...

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Launched in 1988, Topper Forged Valve Company is engaged in manufacturing forged steel valves. Our products cover Forged Steel Ball Valve, Gate Valve, Check Valve, Globe Valve, According to API, BS, DIN, JIS GB Standards.

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