Welded steel pipe is created using a flat steel plate or steel strip, and its manufacturing process results in a seam on its body. Specifically, when welded steel pipe is manufactured, a steel plate or strip is bent and subsequently welded into either a circular, traditional pipe shape or a square shape.
Seamless steel pipe is a circular pipe having a hollow section and no seams around it. The seamless steel pipe is made of carbon steel, alloy steel, stainless steel ingot or solid tube blank, and then is made by hot rolling, cold rolling or cold drawing. Seamless pipes are considered superior to welded pipes as they are built using monolithic steel billets, with intrinsic mechanical strength, without seam welds.
Flange is the part that connects the pipe to the pipe and is connected to the end of the pipe. There are holes in the flange and bolts make the two flanges tightly connected. The flange is sealed with a gasket. And flanges are usually welded or screwed.
Fittings are parts that connect the pipes and aid in changing the direction of the flow or the pipe size or connecting different components for instance elbow fitting, tee fitting, eccentric reducer, and compression fitting, etc.
Ecoway Steel is a Chinese company that specializes in manufacturing a wide variety of top-notch materials for gaskets. These gaskets can be used in various industries such as oil and gas, pulp and paper, chemical, and mining. Our company provides the latest technologies and solutions for gaskets that can withstand even the harshest environments.
Valve is a control component in the pipeline fluid conveying system, which is used to change the passage section and the flow direction of the medium, and has the functions of diversion, cut-off, throttling, check, diversion or overflow and pressure relief. Valves used for fluid control range from the simplest shut-off valve to various valves used in extremely complex automatic control systems. Valves for industrial pipelines. It can be used to control the flow of various types of fluids such as water, steam, oil, gas, mud, various corrosive media, liquid metals and radioactive fluids. The working pressure of the valve can be from 0.0013MPa to 1000MPa ultra-high pressure, and the working temperature can be c-270°C ultra-low temperature to 1430°C high temperature.
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Gate valves are one of the most widespread and versatile control valves used in waterworks, power, wastewater, and pipeline installations. New installations, maintenance, or repair works often necessitate these valves to isolate specific areas or reroute fluid flow throughout a network. Selecting the ideal valve for your application is critical, as it will have a substantial impact on its usage and performance. A well-chosen model helps avoid future problems like leakage or subpar performance, so it is wise to carefully consider your industrial requirements and specifications before purchasing anything. What is a Gate Valve? A gate valve is an adjustable linear motion valve used in various applications. Its primary purpose is to stop the fluid flow by positioning a flat closure element called a gate inside the valve. Valves come in a variety of materials and can be specified by organizations creating standards for specific environments. Common choices include cast iron, stainless steel, forged steel, bronze, and plastic. Gate valves consist of three primary parts: a hand wheel, stem, and bonnet. The handwheel moves the stem to open or close the gate while the bonnet secures both parts together. Types Of Gate Valves A variety of gate valves are available to meet a variety of applications. Parallel Gate Valves Parallel Gate Valves are made of solid metal and used to regulate fluid flow in pipelines. They can be operated manually with pneumatic actuators or electric motors. The basic design of a parallel slide gate valve is as follows: A gate disc is placed between two seats and controlled by a stem and hand wheel that moves up and down at right angles to the direction of fluid flow. Parallel slide gate valves come in various sizes and types, including flanged end, threaded end, and forged. They can be produced using various manufacturing processes such as casting, forging, or machining. Wedge-Shaped Gate Valves Wedge-shaped Gate Valves function by using a wedge disc to start or stop fluid flow. They can be operated manually, electrically, or pneumatically. These valves come in various sizes and can be utilized for a variety of applications. They are constructed from materials such as stainless steel or hard alloys. Split wedge designs provide flexible seating on both the suction side and discharge side of a valve, which is especially helpful in applications with temperature fluctuations since piping and valve dimensions change accordingly. Metal-Seated Gate Valve When selecting a gate valve, one of the primary considerations should be its sealing surface material. Depending on whether your fluid is corrosive or contains abrasive particles, this seat material may be necessary. Industrial gate valves typically consist of stainless steel, cast iron, and ductile iron due to their durability and resistance to corrosion and abrasion. Furthermore, these materials can withstand temperature variations of up to 1500oF (400degF). Resilient Seated Gate Valves Resilient seat gate valves are commonly used on water supply pipelines, municipal drainage projects, firefighting pipeline projects, and industrial pipelines that handle slightly non-corrosive liquids and gases. Resistant seated gate valves offer greater resistance to pressure and temperature changes than metal-seated ones and can be made of various materials like plastic or rubber. This type features a rubber component that absorbs and flushes impurities as the valve closes, restoring its surface back to its original shape when opened again. Rising Stem Designed Gate Valves A Rising Stem Gate Valve is designed with an Outside Screw and Yoke (OS&Y) design, featuring threads on the actuation side that rise together when opened or closed. This provides a visual indicator of valve position, is easily lubricated, and is suitable for manual activation. Rising stem gate valves are typically used in underground or aboveground installations. They come in various designs, such as line blind, t-shape, and angular (90 Degree) shapes. Non-Rising Stem Gate Valves A non-rising gate valve features a screwed stem inside the valve body which rotates with gate movement when viewed from the outside. This design is ideal when monitoring the operation of the valve and is typically installed on aboveground installations for added convenience. A Non-Rising Stem Designed Gate Valve is a type of gate valve with no moving stem as it opens and closes. This design saves installation space and maintenance expenses by eliminating the need to raise and lower the valve stem as necessary. Other Gate Valve Types Many different types of gate valves are employed in pipeline and workplace applications. To make selecting the correct one easier, they have been organized into various categories for convenience. Solid Wedge Valves: Solid wedge valves are a widely-used gate valve type used in pipe installations for liquids and gases. Their robust construction allows them to be fitted into various pipe positions with ease. Split Wedge Valves: These more specialized wedge valves are often used in applications involving corrosives or slurry fluids. The disks on these wedges have been tapered at one end to cut and move through thicker fluids when closing. Pneumatic Operation: These valves are less common, using a pneumatic actuator instead of a handwheel to open or close. Compressed airlifts the stem when opening the valve while compressed air lowers it when closing. Gate Valve Advantages and Disadvantages Gate valves are used to regulate the flow of liquids and gases. They come in various sizes and materials, making them suitable for a range of applications. Let’s take a look at a few of the advantages and disadvantages of gate valves. Advantages Easy To Operate Gate valves are a commonly-used type of valve in various applications due to their ease of operation, durability, and easy installation. They require minimal upkeep and, with proper care, can last for years. They Are Durable & Versatile They are robust and have a long lifespan. Furthermore, they require minimal installation effort, plus repairs can easily be made if any damage does occur. Another advantage of a gate valves is their versatility; they can be installed in various positions, making them perfect for pipeline installations. Furthermore, these valves are built to withstand extreme temperatures and pressures. Better Sealing Operation In general, gate valves are effective at controlling liquid flow within a system. Furthermore, they are constructed from durable materials that can withstand extreme temperatures and pressures – making them an ideal choice for industrial applications. User-friendly Gate valves offer the main advantage of being user-friendly. This makes them suitable for many applications, such as chemical plants, water treatment facilities, and other industrial settings. Furthermore, gate valves are cost-effective solutions for various fluids. Have Multiple Applications Gate valves are one of the most frequently and widely utilized types of valves in the industry. Their design makes them simple to operate, and they can be utilized in a range of applications. Gate valves are used to control and regulate the flow of fluids. They’re ideal for applications involving slurries or viscous liquids. They can be utilized as venting valves and in low vacuum systems. Excellent for Industrial Operations Gate valves are an excellent option for industrial applications due to their durability, long lifespan, and precision control of liquid flow. But before making a final decision on which gate valve best suits your needs, be sure to evaluate both its pros and cons so you can make an informed decision. Disadvantages Slow Opening And Closing Time One of the drawbacks of gate valves is their slow opening and closing time. This can be an issue if you need to quickly stop water or other fluid flow. Furthermore, these components are highly susceptible to corrosion which could cause leaks and other issues. They Clog Easily One of the drawbacks of a gate valve is its tendency to clog easily. This makes them unsuitable for certain applications requiring high levels of cleanliness or optimal hygiene conditions. Furthermore, gate valves are more vulnerable to erosion damage and scratches on their sealing faces, decreasing their durability and service life significantly. How Does the Gate Valve Function? A gate valve is an industrial linear type that can be used to restrict or permit the flow of media. They’re also often employed as shut-off valves during troubleshooting and pipe-cleaning tasks. A handwheel or actuator moves up and down to open and close the gate disc. The stem, which connects to this handwheel or actuator, guides its position relative to the gate disc. A gate valve consists of three main parts: the body, stem, and bonnet. Understanding each component is essential for understanding how it operates. Gate Valve Parts Gate valves are a type of linear industrial valve used to either stop or allow liquid flow. They function by moving a wedge-shaped disc upwards to open or downwards to close. The Handwheel The handwheel is the driving device responsible for opening and closing valves. There are various types of handwheels available, and understanding their mechanism will help you select the best one. The Bonnet The bonnet is a pressure-retaining part of the valve that provides protection to its internal components. It has been designed to withstand operating pressure and the corrosive effects of fluid exposure. The Body Gate valves are slow-opening, multi-turn valves that require more than 360 degrees to fully open and close. This helps avoid water hammer effects as well as disk and seat damage from occurring. The Disc A gate valve’s disc is an essential element of its operation. As the only part in direct contact with media, it needs to be strong and flexible enough to withstand repeated abuse. Disc valves come in a range of types, depending on their function and application. Common choices include split wedge, flexible, and solid wedge valves. The Seat The seat of a valve body may be integral or constructed as part of a seat ring system. Either threading onto the body or pressing in place and then welding ensures secure seating.
read moreNPT stands for National Pipe Thread, and the size of this connection is important if you need to fit the ball in a small space. It is the most common ball valve type and can be found in many different applications. These valves are also very flexible and allow you to install them anywhere you need them. Regardless of its name, an NPT ball valve is a type of ball valve that is threaded. This type of valve is often used in piping systems that need to withstand frequent ‘on and off’ operations. A ball valve with an NPT threaded port is made to operate by hand or with the help of an electric motor. These valves have five major parts and are available in two types – manual and automatic. If you want to know about an NPT ball valve, continue reading this article. Information about NPT Ball Valve NTP stands for National Pipe Taper. It is a type of valve connection. The NPT ball valve connection is the most popular type of ball valve. It is used for various applications, from domestic to industrial, and has several advantages. The end connections are important because they determine how the valve connects to the pipe or component. The term NPT refers to the connection between two pipes with the same diameter. Brass ball valves are used in light commercial applications and are great for multiple purposes. They are used in natural gas, compressed air, domestic hot water, and even irrigation systems. In order to specify the connection type, you should look for two types of NPT threaded ball valves: DIN 1092-1 (European standard) and ANSI/ASME B16.5 (American Society of Mechanical Engineers). The two-way NPT ball valves have threaded ports. These are great for non-sanitary applications, while the flanged connection style is good for larger pipe sizes. Another type of NPT ball valve is the brass-body type. This type of ball valve is made to work with oil, water, and compressed air. Its brass body is fitted with a steel-plated ball and a 1/4-turn brass handle. Teflon seals are installed in the brass body. These valves are great for home water and natural gas piping systems. An NPT ball valve is an integral component of a process that varies widely. Its main difference from other types of valves is the design of its ball. A ball valve’s rotating ball is a simple device located inside the valve and connected to a stem in a slot at one end. When the ball is closed, it blocks the flow of fluid from one end to the other. There are three main types of connections available in ball valves: NPT, Flanged, and Socket Weld. Each type has its advantages and disadvantages, and choosing the right one depends on the requirements of the application. An NTP connection in the ball valve provides a tight seal to prevent any leakages. However, the thread sizes differ as per the valve size.
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Globe valves are common piping components in a huge range of industrial settings. Their time-tested design makes them well-suited for throttling and frequent on/off flow control. But all valves eventually require maintenance or repairs. Let’s walk through the complete process of new globe valve installation best practices, tear down, troubleshooting common issues, and rebuilding globe valves to like-new condition. What You’ll Learn Globe valve anatomy and working principles Proper globe valve installation and orientation Diagnosing leaks and other faults Step-by-step disassembly and inspection Reassembling valves and returning to service Once we cover the complete service process, you’ll have the knowledge to keep your globe valves in peak operating condition for decades of reliable flow control. How Does a Globe Valve Work? Before jumping into problems and looking for a globe valve repair kit, let’s briefly review how globe valves are constructed and control flow. This will make the later troubleshooting and component replacement steps much easier to grasp. Globe valves have three primary sections: Body – the central shell containing all internal components and flow passageway. Usually a two-piece bolted body. Bonnet – the top section that screws onto the body and holds the disk/plug assembly and packing box. Disk/plug – the movable regulating element connected to the stem. Raises or lowers to modulate flow. Many interchangeable trim components then line the globe valve flow direction, including seats, guides, and disks/plugs tailored for specific applications. To open and close, the handwheel turns the stem to raise and lower the disk/plug away from the seat. This permits or restricts flow through the valve body. Globe valves aren’t fully shut off until the disk hard seats against the body seat ring. Proper Globe Valve Installation Configuration Once you choose the optimal globe valve and trim for an application, next comes important globe valve installation considerations. The key is configuring the valve to allow proper disk movement and prevent fluid damage. Globe valve direction – Globe valves only work in one direction. An arrow on the body indicates proper flow. Always install with flow entering below the seat. Orientation – Valves operate best mounted horizontally with the handwheel upright. This allows the disk to fully close on the seat. Vertical mounting can impede full closure. Piping stresses – Use pipe hangers and supports to remove weight or side loads on the valve that could bend the body. Thermal relief – Allow space for valves with extended bonnets to expand/contract without touching other equipment. Consider bellows seal valves. Insulation – Never insulate over the bonnet or handwheel. This leads to overheating that damages packings and stems. Troubleshooting Common Globe Valve Problems Despite best globe valve installation practices, globe valves eventually develop issues from wear, contamination, or corrosion damage. Here are the most frequent problems: External Leakage Leaks coming from the bonnet gaskets or packing box during operation indicate worn seals. Tighten the packing gland nuts moderately – but repeated loosening/tightening accelerates packing wear. Major packing replacement may be needed. Also check body-bonnet gaskets if leakage appears between the two casing halves. Loose flange bolts can also cause leaks over time. Internal Leakage Fluid leaking out the valve outlet when fully closed signals internal damage. The disk likely isn’t fully sealed on the seat, allowing fluid to sneak by the sealing surfaces. This is a major issue requiring teardown to access internal parts. Other Faults Additional problems include stiff handwheel turning from scale/dirt buildup, noisy flow, and emissions from the bonnet. Binding stems and hard shutoff also eventually occur as friction-reducing lubricants are lost from the packing. Any of these operational changes indicate a need for inspection and rebuild. Catching problems early minimizes overall wear. Globe Valve Disassembly Process Once you’ve diagnosed an issue, it’s time to disassemble the globe valve for internal access. This requires meticulous organization of removed components. Follow these step-by-step guidelines: Isolate and depressurize the valve. Drain any trapped fluid. Remove insulation if present. Document original orientation and settings like handwheel position. Take photos for reference later. Unbolt and remove the bonnet from the body. Inspect gaskets for damage. Extract the plug/disk and stem assembly. Note shims or any special trim. Remove seats, guides, and other internal components from the body if present. Clean and degrease all parts if needed but don’t damage surfaces. Inspecting Internals and Planning Repairs Thoroughly examine each part removed during disassembly for: Cracks – especially in threaded areas of the body/bonnet. May require welding repairs. Erosion – from cavitation, flashing, or chemical damage. Replace affected parts. Scale/deposits – buildup impeding function that may need cleaning. Corrosion – pitting that can compromise integrity or sealing. Wear – Look for scoring, galling, flattened seats, and loose stem fits. Leak points – Note any specific sites allowing leakage. Other defects – dents, missing pieces, misalignments, etc. Reassembling Globe Valves After Service Once all worn components are replaced, it’s time to carefully reassemble the globe valve in reverse order: Clean the body passage and seating surfaces of old gasket debris. Install new seat ring, guides, plug tip if used, and other internal trim. Insert the plug/disk onto the valve stem and attach to the body. Slide new packing and spacers onto the stem and insert into the stuffing box. Install new gasket and carefully mate the bonnet to the body. Tighten flange bolts. Adjust gland nuts and packing to slightly compress the box for leak-free stem seal. Check handwheel motion through full stroke. Lightly lubricate the stem and packing if needed. Return valve to original installed position. Pressurize and check for leaks during operation. Consider keeping spare gaskets, packing, and other parts on hand for future maintenance. Frequently Asked Questions – FAQs How to service a globe valve? Service globe valves by isolating, depressurizing, disassembling, cleaning, inspecting, replacing worn parts like seats and packings, then carefully reassembling. Should globe valve installation be vertical or horizontal? Install globe valves horizontally with handwheel upright for optimal disk movement and sealing. Vertical mounting can impede full closure. How to fix a stuck globe valve? Free stuck globe valves by injecting penetrating oil around the packing and stem, tapping the bonnet and handwheel with a mallet, and slowly working the handwheel back and forth. Severely stuck stems may require disassembly. Conclusion Globe valves are found everywhere from chemical plants to HVAC systems due to their proven performance for globe valve flow direction. But their moving parts eventually require servicing to maintain tight shutoff and hassle-free operation. Learning the steps for installing, troubleshooting, disassembling, repairing, and rebuilding globe valves will pay dividends for years of reliable service.
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What are some factors to consider when selecting the Y strainer? There are several things to keep in mind when purchasing this specialized piece of equipment. Having the proper mesh size is important as it can prevent excess pressure drop and premature failure of mechanical components. A good strainer should have multiple sizes of mesh holes. The mesh size will determine how the product functions. Microns are a measurement of one-thousandth of a millimeter. When selecting a Y strainer, make sure to consider the pressure. It is better to use a y strainer in pressures up to 1500 psi. Y strainers are also more versatile since they are able to attach to pipeline flanges in various ways. Depending on the material used, y strainers can be either threaded or welded. The material can be iron, bronze, carbon, or stainless steel. How Do You Select the Y Strainer? The Y strainer is a simple filtration device that is made up of two metal plates held together by bolts or gaskets. The plates squeeze against each other to form a tight seal. Fluid passes through the Y strainer and is discharged through the discharge port. This device prevents contaminants larger than the mesh from entering the machinery. It is a popular choice among industrial businesses that use water and other fluids. Consider Pipe size There are several factors to consider when selecting a Y Strainer. It is important to choose the right one for the system in question since a faulty one can cause considerable damage to the equipment and the environment. Consider the pipe size of the system and the pressure and temperature that you are working in when selecting a Y Strainer. Depending on the size and type of the system, you may need one that has a higher or lower pressure rating. Consider Flow rate There are a few important things to consider when selecting a Y strainer. Flow rate is one of the most important factors, as it will determine how much pressure you can safely reduce. The thicker the material, the slower the flow rate and the higher the chance of pressure reduction. Remember that the size of the pipes has no bearing on the acceptable pressure loss, so it is important to choose a strainer based on the flow rate and the size of the fluid. You can also consult a pressure drop chart online to help you choose the appropriate strainer. Consider Material requirements Another thing to consider is the size of the Y strainer. A smaller one will fit on a smaller pipe and will be less expensive, but it may be undersized or oversized and, therefore, not be suitable for your application. Carbon steel Y strainers are the most preferred option for the oil and petrochemical industries because they are better able to resist thermal and mechanical shock. Furthermore, they are used in higher pressure applications where iron piping is not acceptable. Consider Temperature and pressure range The temperature and pressure range of a Y strainer should be considered when selecting one. Whether the strainer is installed on a metal pipe or a polyethylene piping system, you must be sure to choose the right materials. The plastics in a Y strainer may break or be distorted by shock pressure. When choosing a Y strainer, make sure to choose the right materials to prevent the strainer from rusting or developing other issues. Consider Maintenance Y strainers are important components of industrial equipment that has fluid piping systems. The “Y” shape of these pipe fittings allows them to separate solids from fluids without disrupting downstream components. Y strainers are generally smaller than basket-type strainers and require more frequent cleaning. While this isn’t a huge issue on steam systems, they can introduce large debris during commissioning. If you’re considering a Y strainer for your fluid piping system, consider the following tips to choose the right one for your needs.
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