China Shaanxi Peter International Trade Co., Ltd. Company News

How to Tighten Flange Bolts？ Tightening flange bolts properly is crucial to ensuring a secure and leak-free connection between flanged pipe joints. Incorrectly tightened bolts can lead to leaks, gasket damage, or flange distortion. Here’s a step-by-step guide on how to tighten flange bolts effectively:   1. Preparation: Ensure Correct Bolt and Gasket Selection: Before tightening, verify that the correct bolts, washers, and gaskets are being used for the specific flange type, size, and pressure rating. Clean the Flange and Gasket: Clean both the flange faces and the gasket to remove any dirt, debris, or rust. A clean surface ensures a better seal and even distribution of pressure when the bolts are tightened.   2. Position the Flange and Gasket: Align the Flanges: Place the gasket between the flange faces. Ensure that the gasket is properly aligned with the bolt holes on both flanges. Misalignment can cause uneven pressure distribution, leading to leaks. Insert the Bolts: Insert the flange bolts through the aligned holes of both flanges. Hand-tighten the nuts onto the bolts to hold the flanges together in position.   3. Initial Hand Tightening: Tighten all bolts by hand, ensuring that each bolt is snug but not yet fully tightened. This step helps to distribute the pressure evenly across the flange and gasket, reducing the risk of damaging the gasket or flanges during the final tightening.   4. Follow the Proper Tightening Sequence: Use a Star Pattern: Flange bolts should be tightened in a crisscross or "star" pattern (also called "diagonal" or "opposing" pattern). This helps distribute the pressure evenly across the entire flange. Start tightening from one bolt, then move to the opposite bolt, and continue around the flange in this alternating pattern. For larger flanges, it’s important to follow this pattern to prevent warping. Tighten in Steps: Tighten the bolts gradually in multiple steps, rather than tightening each bolt fully in one go. This ensures the gasket is evenly compressed and prevents uneven sealing.   5. Torque the Bolts: Use a Torque Wrench: To achieve the proper tightness, use a torque wrench to tighten each bolt to the specified torque value. The required torque value will depend on the size, material, pressure rating, and gasket type. Always refer to the manufacturer’s specifications for the correct torque settings. Gradual Increase in Torque: Start by tightening each bolt in the star pattern to about 50% of the recommended torque. Then, repeat the pattern and gradually tighten to 75% and then to 100% of the final torque. This step-by-step tightening ensures the flange connection is even and stable. Avoid Over-tightening: Over-tightening can lead to flange warping, gasket failure, or even bolt breakage. Stick to the recommended torque values to avoid this risk.   6. Check for Even Tightening: After all bolts are torqued to the recommended value, go around the flange one more time to ensure that all bolts are evenly tightened. This helps to verify that no bolt has been missed or unevenly tightened.   7. Inspect for Leaks: Once the bolts are tightened and the flange is securely in place, inspect the flange connection for any leaks. This can be done visually or with a leak detection solution (such as a soap solution or leak detector spray). If leaks are present, re-tighten the bolts in the same crisscross pattern and check again.   8. Re-tighten After a Period of Operation: After the system has been in operation for some time, it may be necessary to re-tighten the bolts. This is because gaskets can compress and settle during initial pressure testing or operation. Re-checking and re-tightening the bolts at a later time ensures continued leak prevention and gasket integrity.   Key Considerations: Proper Torque Values: Always refer to the manufacturer’s recommended torque specifications for the specific size, material, and pressure rating of your flange. Incorrect torque can lead to flange or gasket damage. Bolt Size and Material: Ensure bolts are of the correct size, material, and grade for the application, considering the pipe’s pressure and temperature conditions. Torque Wrench Calibration: Make sure your torque wrench is properly calibrated to ensure accuracy in achieving the correct torque values. Use of Lubricants: In some cases, a small amount of anti-seize lubricant may be applied to the bolt threads to reduce friction and ensure more accurate torque application. However, always check if the flange manufacturer recommends this for your specific application. By following these steps, you can ensure a secure and leak-free flange connection, extending the lifespan of the piping system and reducing the risk of failure.

How to Install Flange Protectors to Prevent Pipe Damage？ Flange protectors are crucial during the transportation, storage, and installation of pipes. They effectively prevent flange damage, contamination, or debris ingress, ensuring that the flange face remains intact and provides reliable sealing during pipe connections. Below are the detailed steps for installing flange protectors:   First, select the appropriate flange protector. Choose a protector based on the size and type of the flange (e.g., from 1/2" to 24" and beyond), ensuring it fits the flange's pressure rating and material. The material of the protector can vary, with common options including plastic protectors (for light protection), rubber or foam protectors (for additional impact and contamination protection), and metal protectors (for high-pressure systems or extreme environments). Additionally, the design of flange protectors differs; some use a snap-on installation, while others may require bolts or straps to secure them in place. The specific choice depends on the required level of protection.   Next, clean the flange surface. Before installing the protector, clean the flange face and surrounding area to remove dust, dirt, or debris, ensuring that the protector can be installed securely and will not carry contaminants into the flange face. Use lint-free cloths, solvents, or brushes for cleaning.   Then, inspect the flange for any damage. Ensure that the flange face has no cracks, dents, or other damage. If damaged, the protector may not provide adequate protection.   When installing the protector, for snap-on types, align the protector with the flange face and gently press or snap it into place. For protectors that require bolts, align the holes in the protector with the bolt holes on the flange and secure them with bolts, tightening them evenly, but avoid overtightening, which could damage the protector or the flange. For rubber or foam protectors, these types typically feature an elastic design and can be directly stretched over the flange, ensuring a snug fit and preventing slippage during handling.   If necessary, to enhance the stability of the protector, additional straps, cords, or adhesive tape can be used to further secure it, ensuring that the protector stays in place during transportation or storage. However, make sure not to over-tighten the securing method, as this could deform the flange or the protector.   Once installed, check if the protector is securely attached and provides full coverage, ensuring that there are no gaps where debris could enter, especially if the flange will be exposed to outdoor or harsh conditions.   If needed, label or mark the protector with relevant information, such as the flange size, type, and other details for future installation and management of the piping system.   Finally, ensure that pipes with installed flange protectors are stored in a safe and dry place, free from pressure from heavy objects or external damage. During transportation, make sure the pipes are securely fixed and additional protective measures are in place to prevent impact or abrasion to the flanges.   In summary, the installation of flange protectors is a simple yet effective measure that helps prevent damage to pipe flanges during storage, transportation, and installation. By following the correct installation procedures and selecting the appropriate materials, it is possible to maintain the integrity of the flange, ensuring a good seal when connecting pipes.

In today's discussion, we're covering the various flange-facing options commonly found in industrial piping systems. The flange face is the surface opposite the hub that makes contact with the corresponding flange or fitting during bolted connections. Here’s a summary of the key points:   1. Raised Face (RF) Description: The raised face is the most common flange face type, with the surface slightly elevated (raised) from the rest of the flange. This helps concentrate the applied surface pressure during bolting, resulting in a stronger seal. Class 150: Raised face height is typically 1/16 inch. Class 400 and higher: Raised face height increases to 1/4 inch. Usage: Typically paired with raised face-to-raised face flanges, creating a stronger, more efficient seal.   2. Flat Face (FF) Description: A flat face, sometimes referred to as a full face, has a smooth, machined surface across the flange. It’s typically used in situations where the flanges are made from different materials or for applications where a raised face may cause issues. Serrated Finish: Flat face flanges also feature a serrated finish, similar to the raised face, to improve gasket sealing.   3. Phonographic and Concentric Serrations Phonographic Serrations: These are spiral grooves, similar to a vinyl record, running from the outer edge to the inner diameter of the flange. This design improves gasket sealing by allowing it to "bite" into the surface. Concentric Serrations: Often used in vacuum applications, these grooves are circular and form a bull’s-eye pattern. They are typically required for more specialized applications and seal configurations.   4. Protecting Flange Faces Face Protectors: To avoid damage during transport or installation, face protectors can be used. These include plastic snap-on protectors that fit into the bolt holes, preventing dents and scratches on the serrated flange faces. Damaged flange faces can result in derating of the flange, so it's crucial to protect them.   5. Ring Type Joint (RTJ) Description: The RTJ is used for high-pressure and high-temperature applications, where a metal-to-metal seal is required. The RTJ gasket sits in a groove on the flange face. When the flanges are bolted together, the gasket is crushed, forming a metal seal. Available Pressure Classes: These are available in various pressure classes, including the Class 150, which uses an R-15 gasket.   6. Alternate Flange Facings: Tongue and Groove: This type involves a "tongue" on one flange that fits into a "groove" on the other flange, providing a secure connection. Male and Female: Similar to the tongue and groove, but with the male side fitting into the female side for a more rigid connection. Special Gaskets: These alternate flange faces require specialized gaskets designed for their unique geometries.   7. Considerations When Ordering Flanges When specifying flange facings, it’s crucial to include all necessary descriptors: Size: e.g., 1/2" or 12". Pressure Class: e.g., 150#, 600#, etc. Flange Type: e.g., weld neck, slip-on, blind, etc. Schedule: Depending on the pipe’s thickness and material. Material of Construction: For example, A105, 316, F11, Inconel 625, etc.   Summary: Flanges are crucial components in piping systems, and choosing the correct flange facing is essential for ensuring a proper seal. Whether you need a Raised Face, Flat Face, Ring Type Joint, or Alternate Flange Faces, it's important to understand the specific requirements of your application, including pressure class, size, material, and flange type. By taking these factors into account, you can ensure that the flange you choose will perform effectively under the required conditions.

In pipeline systems, flanges are key components used to connect pipes, valves, pumps, and other components, ensuring tight connections and preventing leaks. Among the common types of flanges, blind flanges and slip-on flanges are two commonly used options. Understanding the differences between these two types of flanges can help in selecting the appropriate one for a given project.   A blind flange is primarily used to seal the ends of a pipeline. It is a solid structure with no central hole, effectively "blocking" the pipe to prevent leakage of liquids or gases. Blind flanges are widely used in pipeline systems for interruption, testing, or when a temporary closure is needed. Due to their ability to provide a reliable seal, blind flanges are often used in high-pressure or high-temperature environments, especially when future expansions or connections to other pipelines might be required. While blind flanges provide strong sealing and pressure resistance, they tend to be heavier and more complex to install, requiring more time and labor, especially when removal or reinstallation is needed.   A slip-on flange has a simpler design, connecting to the pipe end by sliding it on and fixing it with internal and external welding. The advantage of slip-on flanges lies in their ease of installation and lower cost, making them suitable for medium- and low-pressure systems. Due to the thinner structure of slip-on flanges, they are not typically used in environments with extremely high pressure. Therefore, they are more common in standard pipeline connections. Slip-on flanges not only reduce installation difficulty and time but also lower overall costs, making them suitable for projects with budget constraints. However, they still require internal and external welding, which, though simpler than other types of flanges, still demands a certain level of skill and technique.   Functionally, blind flanges are used primarily to close the ends of pipelines, often for system testing, sealing, or waiting for future expansion. They can withstand higher pressure and are typically used in pipeline systems that require such capabilities. In contrast, slip-on flanges are used to connect two sections of pipe, suitable for low-pressure systems, especially when quick installation and cost savings are important. The main differences between the two types are their pressure resistance, ease of installation, and the types of pipelines they are suited for. Blind flanges are ideal for high-pressure and sealing applications, while slip-on flanges are more suited for low-pressure systems and projects where fast installation is a priority.   In summary, choosing between a blind flange and a slip-on flange should depend on the specific needs of the project. If your pipeline system requires high-pressure sealing or temporary closure of certain sections, a blind flange is the best choice. However, if the project has a limited budget and the installation process needs to be as simple as possible, a slip-on flange would be more appropriate. By comparing the advantages and disadvantages of both, you can make a more informed decision to ensure the long-term stability and safety of your pipeline system.

ANSI flanges are critical components in industrial systems, widely used in the design and operation of piping systems. These flanges are used to connect pipes, valves, pumps, and other equipment, ensuring the smooth and efficient flow of fluids and gases throughout the entire piping network. They are commonly used in industries such as oil and gas, water treatment, chemicals, and power generation. One of the primary functions of ANSI flanges is to maintain the safety and integrity of the system, providing a secure, tight, and leak-proof seal, which is essential for preventing hazardous leaks, pollution, or environmental damage. The sealing performance helps maintain the pressure and temperature stability of the piping system, which is particularly important in high-pressure or high-temperature applications.   ANSI flanges are made from high-quality materials such as carbon steel, stainless steel, and alloys, which have excellent corrosion resistance, wear resistance, and fatigue strength, ensuring the flange's durability and ability to withstand harsh operating conditions. Their strength and durability guarantee the long-term reliability of the entire piping system, reducing the frequency of maintenance and the risk of unexpected downtime. Another key feature of ANSI flanges is their high customizability. Depending on specific application requirements, flanges can be made in various sizes, pressure ratings, and structural types, including weld neck, slip-on, blind, and threaded flanges. This flexibility allows engineers to select the appropriate flange design based on factors such as fluid type, operating pressure, and temperature. Additionally, ANSI flanges can be specially coated or treated to enhance their corrosion resistance or wear resistance, particularly in chemical environments or applications with corrosive substances.   In addition to providing reliable sealing, ANSI flanges also optimize the flow of fluids and gases within the system. Their design helps create smooth transitions between connected equipment, reducing the risk of flow disruptions and preventing efficiency losses or increased energy consumption. By ensuring consistent and unobstructed fluid flow, ANSI flanges contribute to the overall efficiency of the system. Furthermore, their durable structure reduces the need for frequent maintenance, which in the long term helps lower costs.   ANSI flanges comply with stringent industry standards, ensuring their quality and safety. These standards specify key parameters such as flange dimensions, materials, and pressure ratings, ensuring compatibility with other pipeline components. Flanges that adhere to ANSI standards not only deliver high performance and safety but also contribute to the compliance of the entire industrial system.   In summary, ANSI flanges play a vital role in modern industrial piping systems. By providing strong, durable, and customizable connections, they ensure the efficient, safe, and reliable transport of fluids and gases within piping networks. Whether in harsh environmental conditions or in high-pressure and high-temperature applications, ANSI flanges effectively support the smooth operation of industrial systems, reducing downtime, maintenance costs, and failure risks. Due to their exceptional performance and reliability, ANSI flanges are indispensable in maintaining the safety and functionality of modern industrial infrastructure.

AWWA C207 and AWWA C228 are two flange standards commonly used in waterworks and industrial projects, each designed to meet different application needs, especially in varying environmental conditions. AWWA C207 flanges are typically used in standard water systems, such as municipal water distribution networks and wastewater treatment facilities, and are suitable for general pipeline systems. These flanges are generally made from carbon steel, ductile iron, or steel alloys, with design pressures typically reaching up to 250 psi or higher. They are widely used in waterworks facilities, are cost-effective, and easy to source. However, AWWA C207 flanges have limited corrosion resistance, making them unsuitable for highly corrosive environments (e.g., seawater, or areas with severe chemical corrosion).   In contrast, AWWA C228 flanges are specifically designed for corrosion resistance, often made from corrosion-resistant materials or coated with protective layers. These flanges are ideal for environments that require high corrosion protection, such as coastal areas, chemical environments, or locations with aggressive soils. While AWWA C228 flanges are more expensive initially, their excellent corrosion resistance can significantly extend the lifespan of the flanges and reduce maintenance and replacement frequency, offering higher long-term cost-effectiveness.   The choice between these two flange standards depends on the specific requirements of the project. If the project is located in an area with low corrosion risk and budget is a primary concern, AWWA C207 flanges may be the more suitable option. However, for projects exposed to corrosive environments, especially in coastal or chemically harsh areas, AWWA C228 flanges offer greater durability and lower maintenance costs over time. Therefore, selecting the appropriate flange standard should consider environmental conditions, budget, and the long-term operational needs of the project.

The 135th China Import and Export Fair (Canton Fair) opened in Guangzhou on April 15. As of April 17, a total of 107,722 overseas buyers attended offline, coming from 212 countries and regions, representing a 23% increase compared to the previous session. The enthusiastic participation of overseas buyers demonstrates the world's confidence in Chinese manufacturing and economic development. With more innovation and digitization, the Canton Fair once again signals China's commitment to expanding its opening up and sharing development opportunities with the world.   Advanced manufacturing attracts attention Under the theme of "Advanced Manufacturing," the first phase of this Canton Fair highlights advanced industries and technological support, showcasing new productive forces. Wang Shouwen, Vice Minister of Commerce and China's chief international trade negotiator, stated that among the exhibitors at this Canton Fair, there are over 5,500 national-level high-tech enterprises, manufacturing champions, and "little giant" enterprises specializing in unique and new products, representing a 20% increase from the previous session.   Cross-border e-commerce rises strongly As a rapidly emerging new business model in foreign trade in recent years, cross-border e-commerce and overseas warehousing businesses collide with the long-standing Canton Fair, sparking extraordinary results. One highlight of this Canton Fair is the first-ever Cross-border E-commerce and Overseas Warehousing Exhibition Area, covering an area of 3,000 square meters and featuring 158 companies organized by 11 provinces. From edible oil production equipment in a factory to scissors or a cup, products of various types from around the world can be sold to buyers worldwide through cross-border e-commerce. The exhibition area showcases a rich variety of products, attracting a continuous stream of buyers from around the world.   Multiple measures to optimize services In recent years, China has continuously expanded its opening up to the outside world and improved services in payment, transportation, and other areas to enhance the experience of domestic and foreign businessmen. Meanwhile, favorable policies such as export tax rebates have been provided to foreign trade enterprises to actively promote the development of import and export trade. Ensuring the smooth flow of personnel between China and other countries is an important measure to provide high-level services for opening up. So far, China has concluded mutual visa exemption agreements with 157 countries and achieved full visa exemption with 23 countries. Overseas buyers attending the Canton Fair can fully utilize visa-free policies to enjoy corresponding conveniences, while also simplifying visa invitation letter requirements. During the Canton Fair, there has been a noticeable increase in the number of foreigners arriving in Guangzhou. Expanding foreign exchange channels and promoting convenient payment methods enable overseas buyers to not only see new products and trends in China but also experience convenience and hospitality, fully experiencing China's vitality and enthusiasm.

The 24th China International Petroleum & Petrochemical Technology and Equipment Exhibition (cippe2024), an annual global event in the oil and gas industry, opened at the China International Exhibition Center (New Venue) in Beijing on March 25th.   Covering an exhibition area of over 120,000 square meters, the event brought together nearly 2,000 companies from 65 countries and regions, including 52 Fortune 500 companies. The showcase featured a diverse range of independent innovative technologies and products, attracting wide attention from both domestic and international industry players. With over tens of thousands of products on display, the exhibition represented the current direction and advanced level of innovation in the oil and gas industry. Additionally, participating companies hosted multiple product launch events and introduced a variety of innovative technologies and products. Notable exhibits included the XJ2750 meter mobile well repair machine developed by Sinopec, as well as large-scale anti-sulfur compressors and distributed hazardous waste treatment equipment and new turbine fracturing trucks from Jerry Group. These intelligent equipment innovations are tailored to national needs, industry trends, and the urgent need for transformation. Through process improvement, technological transformation, and the innovation of green products, they have driven the optimization and upgrade of the oil and gas industry supply chain, firmly seizing the high ground of future industrial development and releasing more new productive forces.   In 2024, China's energy industry will focus on safe and clean development, accelerate industrial upgrading, and aim to build a modern industrial system. At the 24th China International Petroleum & Petrochemical Technology and Equipment Exhibition, hydrogen energy companies were specially invited, and the HEIE Hydrogen Energy Exhibition was held concurrently. Participating companies such as PetroChina Engineering Technology Research Institute, Aerospace Hydrogen Energy, Dongfang Electric, CIMC Enric, Linde, Ugentech, HopuShares, New Hydrogen Power, Tianlan Intelligent Equipment, Longshen Hydrogen Energy, Binglun Group, Snowman Shares, Henan Yuqing, Hydrexison, Deruite Technology, Richfortune, Eps, and Dongde Hydrogen Energy showcased innovative achievements in the field of hydrogen energy, injecting new momentum into the development of the hydrogen energy industry.   cippe2024 not only showcases new products and technologies but also actively integrates intellectual resources such as industry experts and business leaders. Concurrent events include the Innovation Gold Award, the 2nd Petroleum Technology and Equipment University Presidents Forum and International Oil & Gas Industry Conference, China-Argentina Oil and Gas Matchmaking Meeting, China-Pakistan Economic Corridor and Pakistan Trade and Investment Opportunities, among other special sessions. cippe has always taken it upon itself to support technological innovation and drive industry development, actively building a significant platform for deepening mutual-benefit energy cooperation and expanding international energy exchanges. It contributes to realizing China's goal of becoming a leading energy powerhouse, vigorously promoting green transformation in the economy and society, establishing a sound system for energy green and low-carbon transformation, and enhancing the industrialization level of the energy sector.  

The global flanges market is at a crossroads, presenting a mix of challenges and opportunities that demand attention and strategic action from industry players.   Challenges: Supply Chain Disruption Risk: The flanges market is susceptible to supply chain disruptions, which could stem from geopolitical tensions, natural disasters, or unforeseen events. The reliance on materials such as stainless steel, carbon steel, and alloy steel makes the market vulnerable to interruptions, leading to potential cost escalations for manufacturers. Economic Slowdown and Environmental Pressures: Economic downturns can dampen demand for flanges, while increasing environmental regulations and sustainability concerns pose challenges for certain types of flanges, especially those with higher carbon footprints. Competition from Substitutes: The emergence of substitute products like welding neck flanges poses a threat to the traditional flanges market, compelling manufacturers to innovate and differentiate their offerings.   Opportunities: Technological Advancements and Green Initiatives: Embracing technological innovations and catering to the growing demand for environmentally sustainable solutions present avenues for growth in the flanges market. Manufacturers can capitalize on the shift towards eco-friendly, high-performance flange products to meet evolving customer needs. Infrastructure Expansion Requirements: The ongoing expansion of infrastructure projects globally creates a surge in demand for flanges. This trend offers a promising opportunity for manufacturers to align their product offerings with the infrastructure development needs, driving growth and market penetration. Rising Global Energy Demand: As the global appetite for energy continues to rise, particularly in sectors like oil and gas exploration, there is a corresponding increase in the demand for flanges used in energy-related applications. This surge in demand opens doors for flange manufacturers to tap into new markets and diversify their product portfolio. In conclusion, while challenges such as supply chain risks, economic uncertainties, and competitive pressures loom over the flanges market, strategic responses to these hurdles can unlock significant opportunities for growth and innovation. By leveraging technological advancements, aligning with green initiatives, and capitalizing on infrastructure expansion and energy demand growth, flange manufacturers can navigate the complexities of the market landscape and position themselves for long-term success.

The global flanges market is experiencing growth driven by the increasing demand for energy and infrastructure projects worldwide. As countries undergo urbanization and industrialization, there is a notable rise in the construction of power plants, oil and gas facilities, and other critical infrastructure projects. These projects often necessitate robust piping systems, with flanges playing a pivotal role in securely connecting pipes. Industry reports indicate that global energy demand is projected to increase by approximately 50% by 2050. This upsurge in energy demand and infrastructure development is directly fueling the expansion of the flanges market, given their indispensable role in ensuring the reliability and safety of piping systems.   Moreover, emerging economies are playing a significant role in driving much of this growth. These dynamic markets are witnessing rapid industrialization and infrastructure development, leading to increased demand for flanges and related products. The International Energy Agency (IEA) forecasts a 25% surge in global energy demand from emerging economies, further underlining the importance of flanges in supporting the infrastructure required to meet this growing energy needs. This trend highlights the critical position of flanges in the global industrial landscape, as they continue to be essential components in the development of key energy and infrastructure projects worldwide.   Global Flange Market Shows Strong Growth Momentum Driven by Industrialization and Infrastructure Projects, Particularly in Energy, Chemical, Pharmaceutical, Food Processing, and Water Treatment Sectors. The demand for high-performance and corrosion-resistant materials is also propelling the growth of the flange market, as these materials can meet rigorous working environment requirements.   With the global economic recovery and increasing demands for infrastructure and industrial equipment in emerging markets, the flange market is expected to maintain steady growth. Furthermore, the focus on energy efficiency, environmental protection, and sustainable development is encouraging the adoption of more advanced flange and sealing technologies, further boosting market growth.   In summary, the global flange market is displaying a positive growth trend and is expected to continue its robust development in the coming years.