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Steel Pipe Flanges
Weld Neck (WN), Slip On (SO), Plate Flange (PL), Blind Flange (BL), Socket Weld (SW), Threaded, Lap Joint, RTJ Flange
Materials: Carbon Steel (A105, A234 WPB), Stainless Steel (304, 316L), Alloy Steel, Duplex & Super Duplex (F51, F53)
Standards: ANSI/ASME B16.5, ASME B16.9, EN 1092-1, JIS B2220, DIN 2501, GOST 12820, GB/T 9119Class 150–2500, PN20–PN420, SCH40/SCH80/SCH120/SCH160/XXS
A Tube Sheet Flange (often referred to simply as a Tubesheet) is a critical, specialized component primarily used in shell-and-tube heat exchangers, boilers, and pressure vessels. It is a thick, circular, forged steel plate integrated with a flange rim, serving the dual purpose of structurally supporting a bundle of tubes and acting as a pressure-containing seal to isolate two different fluids.Core Design & FunctionsTube Support & AlignmentIt is precision-drilled with hundreds or thousands of accurately spaced, sized holes to securely hold heat-exchanger tubes.Tubes are fixed into the holes via welding, roller expansion, or hydraulic expansion to ensure rigidity and prevent leaks.It acts as the main structural "skeleton" for the entire tube bundle, resisting vibration, thermal stress, and internal pressure.Fluid Isolation & SealingThe outer flange face connects and seals to the vessel/shell, creating an impermeable barrier.It strictly separates the tube-side fluid (flowing inside the tubes) from the shell-side fluid (flowing around the tubes in the vessel), preventing cross-contamination.Pressure BoundaryAs part of the pressure vessel, it must withstand high internal pressures (up to Class 2500/PN420) and extreme temperatures.Key FeaturesConstruction: Typically manufactured from a single forged plate for high strength.Precision: Extremely tight tolerances for hole diameter, pitch, perpendicularity, and surface finish.Flange Face: Available with standard flange facings such as Raised Face (RF), Ring Type Joint (RTJ), or Flat Face (FF) for connection.Sizes: Ranges from small diameters to very large sizes (4–5 meters common in power and chemical plants).Standards: Designed and manufactured per ASME Section VIII, ASME B16.5, B16.47, and GB 150/151.Common MaterialsCarbon Steel: A105, A350 LF2, Q345R (for general, non-corrosive service).Stainless Steel: 304/304L, 316/316L (for corrosive environments).High-Alloy & Special Metals: Titanium, Hastelloy, Inconel, Duplex Steel (for highly corrosive, high-temperature, or high-pressure services).Typical ApplicationsShell-and-Tube Heat Exchangers (oil refineries, chemical plants)Boilers & Steam Generators (power stations)Condensers & Evaporators (HVAC, refrigeration, desalination)Pressure Vessels (petrochemical, nuclear industries)AdvantagesDual Functionality: Combines structural support and pressure sealing in one component.Extreme Durability: Handles high pressure, temperature, and thermal cycling.Superior Sealing: Ensures zero leakage between process fluids.Customizable: Fabricated in any size, material, or hole pattern to meet project specifications.
Threaded Flange (TH) is a flange connected to the pipe by thread, without welding, which is convenient for disassembly and maintenance. It has the advantages of simple structure, quick installation, no damage to the pipe during installation, and is suitable for low-pressure, small-diameter pipeline systems and scenarios that require frequent disassembly. As a convenient and practical flange type, it is widely used in various light industrial and civilian pipeline systems, perfectly meeting the needs of international trade and small-scale project applications.Core AdvantagesNo Welding Required: Connected by thread, avoiding welding operations, reducing construction difficulty and preventing pipe damage caused by welding.Easy Disassembly & Maintenance: Can be quickly disassembled and assembled, convenient for pipeline maintenance, inspection and replacement of components.Simple Structure & Quick Installation: Small volume, light weight, simple structure, quick installation, improving construction efficiency.Suitable for Small Diameter: Especially suitable for small-diameter pipeline systems (DN15 ~ DN100), with good applicability.Global Standard Compliance: Strictly manufactured in accordance with international and national standards, fully adapting to global market requirements.Key SpecificationsStandards: International Standard (ISO 7005), American Standard (ASME B16.5), German Standard (DIN 2501), European Standard (EN 1092-1), Japanese Standard (JIS B2220), Chinese Standard (GB/T 9114, HG/T 20592, HG/T 20615)Materials: Carbon steel (A105, 20#, Q235B), stainless steel (304, 316L), alloy steel (16Mn) — customizable according to medium and working conditions.Pressure Ratings: Class 150, 300; PN10, PN16, PN25Nominal Diameter: DN15 ~ DN100 (NPS 1/2" ~ 4")Thread Type: NPT (American Standard), BSP (British Standard), G (Metric Thread)Sealing Surface Types: FF (Flat Face), RF (Raised Face)Working Temperature: -20℃ ~ 300℃ (customizable for special requirements)ApplicationsWidely applied in water supply and drainage, HVAC, gas pipeline, chemical engineering (low pressure), pharmaceutical, food and beverage, small-scale industrial equipment and other industries. It is an ideal flange connection solution for low-pressure, small-diameter pipeline systems and scenarios requiring frequent disassembly, and is exported to countries and regions around the world, favored by global customers for its convenience.As a professional manufacturer based in Cangzhou Pipeline Equipment Manufacturing Base, Hebei, China, we provide customized services for Threaded Flanges according to customer drawings, specifications, materials and standards, and offer one-stop supply and after-sales support to meet the personalized needs of global projects.Threaded Flange (TH) is a flange connected to the pipe by thread, without welding, which is convenient for disassembly and maintenance. It has the advantages of simple structure, quick installation, no damage to the pipe during installation, and is suitable for low-pressure, small-diameter pipeline systems and scenarios that require frequent disassembly. As a convenient and practical flange type, it is widely used in various light industrial and civilian pipeline systems, perfectly meeting the needs of international trade and small-scale project applications.Core AdvantagesNo Welding Required: Connected by thread, avoiding welding operations, reducing construction difficulty and preventing pipe damage caused by welding.Easy Disassembly & Maintenance: Can be quickly disassembled and assembled, convenient for pipeline maintenance, inspection and replacement of components.Simple Structure & Quick Installation: Small volume, light weight, simple structure, quick installation, improving construction efficiency.Suitable for Small Diameter: Especially suitable for small-diameter pipeline systems (DN15 ~ DN100), with good applicability.Global Standard Compliance: Strictly manufactured in accordance with international and national standards, fully adapting to global market requirements.Key SpecificationsStandards: International Standard (ISO 7005), American Standard (ASME B16.5), German Standard (DIN 2501), European Standard (EN 1092-1), Japanese Standard (JIS B2220), Chinese Standard (GB/T 9114, HG/T 20592, HG/T 20615)Materials: Carbon steel (A105, 20#, Q235B), stainless steel (304, 316L), alloy steel (16Mn) — customizable according to medium and working conditions.Pressure Ratings: Class 150, 300; PN10, PN16, PN25Nominal Diameter: DN15 ~ DN100 (NPS 1/2" ~ 4")Thread Type: NPT (American Standard), BSP (British Standard), G (Metric Thread)Sealing Surface Types: FF (Flat Face), RF (Raised Face)Working Temperature: -20℃ ~ 300℃ (customizable for special requirements)ApplicationThreaded Flange (TH) is a flange connected to the pipe by thread, without welding, which is convenient for disassembly and maintenance. It has the advantages of simple structure, quick installation, no damage to the pipe during installat
English IntroductionSocket Weld Flange (SW) is a flange with a socket structure, which inserts the pipe into the flange socket and fixes it by fillet welding. It has the advantages of compact structure, small volume, reliable sealing and strong pressure resistance, and is suitable for small-diameter, high-pressure pipeline systems. As a high-performance flange type for small-diameter pipelines, it is widely used in high-pressure, high-precision industrial pipeline systems, perfectly meeting the needs of international trade and high-end small-diameter project applications.Core AdvantagesCompact Structure: Small volume, light weight, suitable for narrow installation spaces and small-diameter pipeline systems.Reliable Sealing & High Pressure Resistance: The socket structure and fillet welding ensure good sealing performance and strong pressure resistance, suitable for high-pressure working conditions.Smooth Internal Flow: The pipe is inserted into the socket, with smooth internal transition, reducing fluid resistance and avoiding medium accumulation.Easy Installation: The socket design is convenient for pipe alignment and welding, improving construction efficiency and welding quality.Global Standard Compliance: Strictly manufactured in accordance with international and national standards, fully adapting to global market requirements.Key SpecificationsStandards: International Standard (ISO 7005), American Standard (ASME B16.5), German Standard (DIN 2501), European Standard (EN 1092-1), Japanese Standard (JIS B2220), Chinese Standard (GB/T 9117, HG/T 20592, HG/T 20615)Materials: Carbon steel (A105, 20#), stainless steel (304, 316L), alloy steel (16Mn, 15CrMo, F11) — customizable according to medium and working conditions.Pressure Ratings: Class 300, 600, 900, 1500, 2500; PN25, PN40, PN63, PN100Nominal Diameter: DN15 ~ DN100 (NPS 1/2" ~ 4")Sealing Surface Types: RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint)Working Temperature: -40℃ ~ 550℃ (customizable for high-temperature special requirements)ApplicationsWidely applied in petroleum, petrochemical, natural gas, power generation, chemical engineering, nuclear energy and other high-end industries. It is an ideal flange connection solution for small-diameter, high-pressure, high-precision pipeline systems, especially suitable for pipeline systems with high requirements for fluid flow and sealing, and is exported to countries and regions around the world, winning wide recognition from global customers.As a professional manufacturer based in Cangzhou Pipeline Equipment Manufacturing Base, Hebei, China, we provide customized services for Socket Weld Flanges according to customer drawings, specifications, materials and standards, and offer one-stop supply and after-sales support to meet the personalized needs of global projects.
Lap Joint Flange (LJ), also known as Loose Flange, is a flange composed of a flange ring and a Stub End (lap joint short section). The flange ring is loosely sleeved on the Stub End, which is welded to the pipe, and the flange ring is connected by bolting. It has the advantages of convenient disassembly, low cost, and no damage to the pipe during disassembly, and is suitable for large-diameter, low and medium pressure pipeline systems and scenarios that require frequent disassembly. As a flexible flange type, it is widely used in various industrial pipeline systems, perfectly meeting the needs of international trade and large-diameter project applications.Core AdvantagesConvenient Disassembly: The flange ring is loosely sleeved on the Stub End, which can be quickly disassembled without damaging the pipe and Stub End, facilitating maintenance and replacement.Cost-Effective: The flange ring has a simple structure and low manufacturing cost, especially suitable for large-diameter pipeline systems, reducing overall project costs.Good Adaptability: Suitable for large-diameter, low and medium pressure pipeline systems, compatible with various media, and can adapt to slight pipeline displacement.No Pipe Damage: Disassembly only involves the flange ring, avoiding damage to the pipe and welding joints, extending the service life of the pipeline.Global Standard Compliance: Strictly manufactured in accordance with international and national standards, fully adapting to global market requirements.Key SpecificationsStandards: International Standard (ISO 7005), American Standard (ASME B16.5), German Standard (DIN 2501), European Standard (EN 1092-1), Japanese Standard (JIS B2220), Chinese Standard (GB/T 9118, HG/T 20592, HG/T 20615)Materials: Flange Ring: Carbon steel (A105, Q235B), Stainless steel (304, 316L); Stub End: Carbon steel (20#, 16Mn), Stainless steel (304, 316L) — customizable according to medium and working conditions.Pressure Ratings: Class 150, 300, 600; PN10, PN16, PN25, PN40Nominal Diameter: DN50 ~ DN2000 (NPS 2" ~ 80")Sealing Surface Types: RF (Raised Face), FF (Flat Face)Working Temperature: -20℃ ~ 450℃ (customizable for special requirements)ApplicationsWidely applied in petroleum, petrochemical, natural gas, water supply and drainage, HVAC, chemical engineering, marine and other industries. It is an ideal flange connection solution for large-diameter, low and medium pressure pipeline systems and scenarios requiring frequent disassembly, such as pipeline maintenance, inspection and medium replacement, and is exported to countries and regions around the world, winning unanimous recognition from global customers.As a professional manufacturer based in Cangzhou Pipeline Equipment Manufacturing Base, Hebei, China, we provide customized services for Lap Joint Flanges (including flange rings and Stub Ends) according to customer drawings, specifications, materials and standards, and offer one-stop supply and after-sales support to meet the personalized needs of global projects.
Blind Flange (BL) is a flange with a solid disc structure, used to seal the end of the pipeline, prevent the leakage of medium and protect the internal structure of the pipeline. It is connected to the pipeline by bolting, with a simple structure, reliable sealing and strong pressure resistance, and is widely used in all types of pipeline systems that need to be sealed temporarily or permanently. As an essential sealing component in pipeline systems, it perfectly meets the needs of international trade and various project applications.Core AdvantagesReliable Sealing: Solid disc structure, combined with high-precision sealing surface and gasket, ensures reliable sealing, preventing medium leakage.Strong Pressure Resistance: Thick disc design, strong bearing capacity, suitable for low, medium and high pressure pipeline systems.Simple Structure & Easy Installation: No complex processing, easy to bolt and install, convenient for disassembly and maintenance when needed.Wide Application: Suitable for all types of pipeline systems, can be used for temporary sealing (maintenance, inspection) or permanent sealing of pipeline ends.Global Standard Compliance: Strictly manufactured in accordance with international and national standards, fully adapting to global market requirements.Key SpecificationsStandards: International Standard (ISO 7005), American Standard (ASME B16.5), German Standard (DIN 2501), European Standard (EN 1092-1), Japanese Standard (JIS B2220), Chinese Standard (GB/T 9113, HG/T 20592, HG/T 20615)Materials: Carbon steel (A105, 20#, Q235B), stainless steel (304, 316L), alloy steel (16Mn, F11, F22) — customizable according to medium and working conditions.Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500; PN10, PN16, PN25, PN40, PN63, PN100Nominal Diameter: DN15 ~ DN2000 (NPS 1/2" ~ 80")Sealing Surface Types: RF (Raised Face), FF (Flat Face), RTJ (Ring Type Joint), MFM (Male-Female Face)Working Temperature: -40℃ ~ 600℃ (customizable for high-temperature special requirements)ApplicationsWidely applied in petroleum, petrochemical, natural gas, power generation, chemical engineering, water supply and drainage, HVAC and other industries. It is an essential sealing component for pipeline systems, used for sealing pipeline ends, equipment interfaces, and temporary sealing during pipeline maintenance and inspection, and is exported to countries and regions around the world, winning unanimous recognition from global customers.As a professional manufacturer based in Cangzhou Pipeline Equipment Manufacturing Base, Hebei, China, we provide customized services for Blind Flanges according to customer drawings, specifications, materials and standards, and offer one-stop supply and after-sales support to meet the personalized needs of global projects.
Slip On Flange (SO) is a widely used flange type with a sleeve structure, which is sleeved on the pipe and fixed by fillet welding. It has the advantages of simple structure, easy alignment, low cost and convenient installation, and is suitable for medium and low pressure pipeline systems. As a versatile flange type, it is widely used in various industrial and civil pipeline systems, perfectly meeting the needs of international trade and general project applications.Core AdvantagesEasy Installation & Alignment: The sleeve structure allows the flange to be easily sleeved on the pipe, convenient for alignment and welding, improving construction efficiency.Cost-Effective: Simple manufacturing process, lower cost than Weld Neck Flanges, suitable for medium and low pressure scenarios with large demand.Good Sealing Performance: Adopts precision machining of the sealing surface, combined with gaskets, to ensure reliable sealing under medium and low pressure conditions.Wide Compatibility: Suitable for medium and low pressure, normal-temperature and medium-temperature pipeline systems, compatible with various media such as water, gas, oil and general chemicals.Global Standard Compliance: Strictly manufactured in accordance with international and national standards, fully adapting to global market requirements.Key SpecificationsStandards: International Standard (ISO 7005), American Standard (ASME B16.5), German Standard (DIN 2501), European Standard (EN 1092-1), Japanese Standard (JIS B2220), Chinese Standard (GB/T 9116, HG/T 20592, HG/T 20615)Materials: Carbon steel (A105, 20#, Q235B), stainless steel (304, 316L), alloy steel (16Mn, 15CrMo) — customizable according to medium and working conditions.Pressure Ratings: Class 150, 300, 600; PN10, PN16, PN25, PN40Nominal Diameter: DN15 ~ DN2000 (NPS 1/2" ~ 80")Sealing Surface Types: RF (Raised Face), FF (Flat Face), MFM (Male-Female Face)Working Temperature: -40℃ ~ 450℃ (customizable for special requirements)ApplicationsWidely applied in petroleum, petrochemical (low and medium pressure), natural gas (low pressure), water supply and drainage, HVAC, chemical engineering, food and beverage and other industries. It is an ideal flange connection solution for medium and low pressure, normal-temperature and medium-temperature pipeline systems, and is exported to countries and regions around the world, winning wide recognition from global customers.As a professional manufacturer based in Cangzhou Pipeline Equipment Manufacturing Base, Hebei, China, we provide customized services for Slip On Flanges according to customer drawings, specifications, materials and standards, and offer one-stop supply and after-sales support to meet the personalized needs of global projects.
Weld Neck Flange (WN) is a high-pressure flange with a long neck and smooth transition between the flange and the pipe, widely used in high-pressure, high-temperature and high-vibration pipeline systems. It is connected to the pipe by butt welding, which can effectively reduce stress concentration, improve the bearing capacity of the flange, and ensure the tightness and stability of the pipeline connection. As a core flange type in the global industrial field, it perfectly meets the requirements of international trade and high-end project applications.Core AdvantagesExcellent Pressure & Temperature Resistance: The long neck design and butt welding structure make it suitable for high-pressure (up to Class 2500/PN100) and high-temperature working conditions, with strong load-bearing capacity.Low Stress Concentration: The smooth transition between the neck and the pipe avoids local stress accumulation, reducing the risk of leakage and damage in harsh environments.Good Sealing Performance: Adopts precision machining technology, with high flatness of the sealing surface, ensuring reliable sealing even under high pressure and frequent vibration.Wide Compatibility: Suitable for various pipeline media, including corrosive, flammable and explosive fluids, widely used in high-end industrial fields.Global Standard Compliance: Strictly manufactured in accordance with international and national standards, fully adapting to global market requirements.Key SpecificationsStandards: International Standard (ISO 7005), American Standard (ASME B16.5, API 605), German Standard (DIN 2501), European Standard (EN 1092-1), Japanese Standard (JIS B2220), Chinese Standard (GB/T 9115, HG/T 20592, HG/T 20615)Materials: Carbon steel (A105, 20#, Q235B), alloy steel (16Mn, F11, F22, 15CrMo), stainless steel (304, 316L, 321, 2205), special alloys (Monel, Hastelloy, Titanium) — customizable according to medium and working conditions.Pressure Ratings: Class 150, 300, 600, 900, 1500, 2500; PN10, PN16, PN25, PN40, PN63, PN100Nominal Diameter: DN15 ~ DN2000 (NPS 1/2" ~ 80")Sealing Surface Types: RF (Raised Face), RTJ (Ring Type Joint), FF (Flat Face), MFM (Male-Female Face)Working Temperature: -40℃ ~ 600℃ (customizable for high-temperature special requirements)ApplicationsWidely applied in petroleum, petrochemical, natural gas, power generation, nuclear energy, chemical engineering and other high-end industries. It is an ideal flange connection solution for high-pressure, high-temperature, high-vibration and corrosive pipeline systems, and is exported to countries and regions around the world, winning unanimous recognition from global customers.As a professional manufacturer based in Cangzhou Pipeline Equipment Manufacturing Base, Hebei, China, we provide customized services for Weld Neck Flanges according to customer drawings, specifications, materials and standards, and offer one-stop supply and after-sales support to meet the personalized needs of global projects.
Plate Flange (PL) is a common flat-type flange with a simple structure, light weight and low cost, widely used in low-pressure pipeline systems. It is connected to the pipe by welding or bolting, with a flat sealing surface, which is easy to process and install. As a cost-effective flange type, it is widely used in general industrial pipelines and civilian pipeline systems, perfectly meeting the needs of international trade and general project applications.Core AdvantagesSimple Structure & Low Cost: Simple manufacturing process, light weight, low production cost, suitable for large-scale promotion and application in low-pressure scenarios.Easy Installation & Maintenance: Flat sealing surface, easy to align and install, simple maintenance, low later operation cost.Wide Application Range: Suitable for low-pressure, normal-temperature pipeline systems, compatible with various non-corrosive media, and widely used in general industrial and civilian fields.Standardized Production: Strictly in line with global standards, uniform specifications, easy to replace and match with other pipeline components.Customizable: Can be customized according to customer requirements in terms of size, material and sealing surface type.Key SpecificationsStandards: International Standard (ISO 7005), American Standard (ASME B16.5), German Standard (DIN 2501), European Standard (EN 1092-1), Japanese Standard (JIS B2220), Chinese Standard (GB/T 9119, HG/T 20592, HG/T 20615)Materials: Carbon steel (A105, 20#, Q235B), stainless steel (304, 316L), alloy steel (16Mn) — customizable according to medium and working conditions.Pressure Ratings: Class 150, 300; PN10, PN16, PN25Nominal Diameter: DN15 ~ DN2000 (NPS 1/2" ~ 80")Sealing Surface Types: FF (Flat Face), RF (Raised Face)Working Temperature: -20℃ ~ 300℃ (customizable for special requirements)ApplicationsWidely applied in water supply and drainage, HVAC, chemical engineering (low-pressure), food and beverage, pharmaceutical, civil construction and other industries. It is an ideal flange connection solution for low-pressure, normal-temperature and non-corrosive pipeline systems, and is exported to countries and regions around the world, favored by global customers for its cost-effectiveness.As a professional manufacturer based in Cangzhou Pipeline Equipment Manufacturing Base, Hebei, China, we provide customized services for Plate Flanges according to customer drawings, specifications, materials and standards, and offer one-stop supply and after-sales support to meet the personalized needs of global projects.
Orifice Plate (OP) is a key differential pressure flow element widely used in pipeline systems to measure the flow rate of liquid, gas and steam. It is usually installed together with Orifice Flanges (OF) to form a complete flow metering unit.Materials Available materials include carbon steel (A105, 20#, Q235B), alloy steel (16Mn, F11, F22, 15CrMo), stainless steel (304, 316L, 321, 2205) and special alloys (Monel, Hastelloy, titanium), suitable for various medium, temperature and pressure working conditions.
A spectacle blind flange (also known as a figure-8 blank) is a pressure-retaining industrial fitting used in piping systems for positive isolation and flow control. It is a single-piece metal component shaped like the number 8 or a pair of spectacles. It consists of two discs connected by a narrow web: Solid Disc (Blind End): A fully sealed plate that blocks fluid flow when positioned in the pipeline.Open Disc (Spacer End): A ring with a bore matching the pipe's inner diameter, allowing unobstructed flow when in place. Function & Operation Installed between two flanges, it is manually rotated 180 degrees to switch between two states: OPEN (Flow): The spacer ring is aligned with the pipe bore for normal operation.CLOSED (Isolation): The solid plate is inserted to provide a leak-proof seal for maintenance, testing, or safety shutdowns. Key Features Positive Isolation: Provides a physical, visual barrier superior to valves.Interlocked Design: The two ends are permanently connected, preventing loss or misplacement.Standards: Manufactured per ASME B16.48 and other international specifications.Materials & Ratings: Available in carbon steel, stainless steel, alloys; sizes 1/2" to 48" (DN15 to DN1200); pressure classes from 150# to 2500#. Applications Widely used in oil & gas, petrochemical, power generation, and refinery industries where absolute flow separation is critical.
An orifice flange is a specialized pipe flange designed exclusively for flow measurement in industrial piping systems. It is always installed in pairs, securely clamping an orifice plate between them. Core Function & Working Principle The primary function is to create a calibrated restriction (the orifice plate) in the flow path. As fluid (liquid or gas) passes through the plate's precision-bored hole: Flow Restriction: The fluid accelerates through the smaller opening.Pressure Drop: A measurable pressure difference occurs, with higher pressure upstream and lower pressure downstream.Flow Calculation: Built-in pressure taps on the flanges connect to a differential pressure (DP) transmitter. Using Bernoulli's principle, the DP is converted into an accurate flow rate. Key Features Pressure Taps: Two radial drilled holes (typically 1/2" NPT) per flange for precise pressure measurement.Jack Screws: Threaded holes on the flange face to easily separate the pair for orifice plate inspection or replacement without full disassembly.Standard: Manufactured per ASME B16.36, which governs their design, dimensions, and tolerances. Common Types Weld Neck Orifice Flange: The most robust type, ideal for high-pressure, high-temperature, and critical service applications.Slip-On Orifice Flange: Easier to install, used for lower-pressure systems.Threaded Orifice Flange: Used in small, low-pressure lines where welding is not feasible. Materials & Applications Common Materials: Carbon Steel (A105), Stainless Steel (304/316), and special alloys for corrosive environments.Typical Uses: Widely applied in oil & gas, refineries, chemical plants, power stations, and water treatment facilities for monitoring the flow of liquids, gases, and steam.
A Ring Type Joint (RTJ) Flange is a heavy-duty, high-performance piping flange specifically engineered for extreme high-pressure and high-temperature (HPHT) service. It is distinguished by its precision-machined groove on the sealing face, which holds a solid metal ring gasket to create a superior, leak-proof seal.Core Design & Sealing Principle Grooved Face: The flange face features a precision-machined annular groove designed to securely seat the metal gasket.Metal Gasket: A solid, ring-shaped gasket (typically octagonal or oval in cross-section) is placed within the groove. Common gasket materials include soft iron, carbon steel, stainless steel, or nickel-based alloys, chosen to be softer than the flange material.Metal-to-Metal Seal: When the flange bolts are tightened, the gasket is mechanically compressed and deforms plastically. It flows into the microscopic imperfections of the flange groove, creating an impermeable metal-to-metal seal.Pressure-Energized: The design is inherently pressure-energized; internal process pressure acts on the gasket, pushing it outward to enhance the seal as pressure increases.Key CharacteristicsPressure & Temperature Rating: Primarily used for Class 600 (PN100) and higher pressure ratings, and temperatures typically exceeding 800°F (427°C).Gasket Styles: The most common types are Style R (Octagonal/Oval), Style RX (pressure-energized, interchangeable with R), and Style BX (for ultra-high pressures up to Class 2500).Standards: Manufactured to ASME B16.5, ASME B16.47, and API 6A standards.Flange Types: Available in Weld Neck, Blind, and sometimes Socket Weld configurations.Primary ApplicationsOil & Gas: Wellhead equipment, offshore platforms, and high-pressure transmission pipelines.Petrochemical & Refining: High-pressure reactors, heat exchangers, and steam lines.Power Generation: Boiler circuits, high-temperature/high-pressure steam systems.Chemical Processing: Severe-duty, corrosive, or high-pressure process lines.AdvantagesSuperior Sealing: Provides the most reliable, leak-proof connection for the most demanding HPHT conditions.Durability: Metal gaskets resist degradation from heat, pressure, and chemicals better than soft gaskets.Safety: Critical for systems where leakage could pose catastrophic safety or environmental risks.
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Main products: WN, SO, PL, BL flanges, elbows, tees, reducers, caps. Materials: carbon steel, stainless steel, alloy steel. Standards: ASME, ANSI, EN, JIS, DIN. Export to global pipeline projects. Contact Us