Product Description
1. Introduction
ANSI B16.5 ANSI 300 Stainless Steel High - Quality Pressure Vessel Flanges are essential components in pressure vessel systems, playing a crucial role in ensuring the safe and efficient operation of industrial processes. These flanges are manufactured in accordance with the strict ANSI B16.5 standard, which defines the dimensions, ratings, and tolerances for pipe flanges and flanged fittings. The "ANSI 300" rating indicates their pressure - bearing capacity, while the use of stainless steel guarantees excellent corrosion resistance, strength, and durability.
2. Material Properties and Composition
2.1 Material Properties
- Corrosion Resistance: Stainless steel, the primary material of these flanges, offers outstanding resistance to a wide variety of corrosive media, including chemicals, moisture, and atmospheric elements. This property makes them highly suitable for applications in chemical plants, petrochemical facilities, and marine environments where exposure to corrosive substances is common.
- High - Temperature Resistance: They can maintain their mechanical properties and structural integrity at elevated temperatures, allowing them to be used in high - heat applications such as boilers, furnaces, and heat exchangers without significant degradation.
- Mechanical Strength: Despite their corrosion - resistant nature, ANSI 300 stainless steel flanges possess sufficient tensile and yield strength to withstand the high pressures specified by the ANSI 300 rating. This ensures the safe containment and transportation of fluids and gases within pressure vessels.
2.2 Chemical Composition
The chemical composition of the stainless steel used in these flanges varies depending on the specific grade, but common elements and their functions are as follows:
| Element |
Function |
Typical Content Range |
| Chromium (Cr) |
Forms a passive oxide layer on the surface, providing excellent corrosion resistance |
16 - 18% |
| Nickel (Ni) |
Enhances corrosion resistance, especially in reducing environments, and improves the material's ductility |
8 - 10.5% |
| Molybdenum (Mo) |
Significantly improves resistance to pitting and crevice corrosion, particularly in chloride - rich environments |
2 - 3% |
| Carbon (C) |
Contributes to the strength of the steel, but lower carbon content (e.g., in stainless steel grades like 316L) reduces the risk of intergranular corrosion |
≤0.08% (standard); ≤0.03% (L - grade for better corrosion resistance) |
| Manganese (Mn) |
Aids in the formation of austenite and improves the strength and hardenability of the steel |
≤2% |
| Silicon (Si) |
Helps with deoxidation during steel production and can enhance strength |
≤1% |
Common stainless steel grades used for these flanges include 304, 304L, 316, and 316L, each with its own unique combination of properties:
| Grade |
Main Characteristics |
| 304 |
Good general - purpose corrosion resistance, widely used in various industries |
| 304L |
Low - carbon version of 304, offers improved resistance to intergranular corrosion |
| 316 |
Enhanced corrosion resistance due to the addition of molybdenum, suitable for more aggressive environments |
| 316L |
Low - carbon version of 316, provides even better resistance to intergranular corrosion and is often preferred in applications where weldability is crucial |
3. ANSI B16.5 Standard and Pressure Rating
3.1 ANSI B16.5 Standard
The ANSI B16.5 standard provides a comprehensive set of guidelines for the design, dimensions, and tolerances of pipe flanges. It ensures that flanges from different manufacturers are interchangeable, facilitating the construction and maintenance of piping systems. Key aspects of the standard include:
- Flange Types: Defines various types of flanges such as weld - neck, slip - on, blind, and threaded flanges, each with its own design and application suitability.
- Dimensions: Specifies the outer diameter, bolt - hole patterns, face - to - face dimensions, and other critical measurements to ensure proper fit and alignment.
- Rating Systems: Establishes pressure - temperature ratings for different flange materials and sizes, allowing engineers to select the appropriate flange for a given application.
3.2 ANSI 300 Pressure Rating
The ANSI 300 rating indicates that these flanges are designed to withstand a specific range of pressures at different temperatures. At ambient temperature (around 20°C), an ANSI 300 flange can typically handle a maximum pressure of approximately 52 bar (750 psi). However, as the temperature increases, the maximum allowable pressure decreases according to the pressure - temperature rating charts provided in the ANSI B16.5 standard. This rating system ensures that the flanges are used within safe operating limits, preventing leaks and potential failures.
4. Key Features
- Precision Manufacturing: These flanges are manufactured with high precision to meet the strict requirements of the ANSI B16.5 standard. This ensures accurate dimensions, proper bolt - hole alignment, and a flat sealing surface, which are essential for creating a leak - proof joint.
- Versatile Application: Suitable for a wide range of industries and applications, including chemical processing, oil and gas, power generation, and food and beverage. Their ability to withstand high pressures and resist corrosion makes them a reliable choice for various fluid and gas handling systems.
- Ease of Installation: The design of ANSI B16.5 flanges, such as the slip - on and weld - neck types, allows for relatively easy installation. Weld - neck flanges, for example, provide a strong, seamless connection when welded to the pipe, while slip - on flanges can be quickly positioned and welded in place, reducing installation time and labor costs.
- Long Service Life: Due to their high - quality stainless steel construction and compliance with strict standards, these flanges have a long service life. They can withstand the rigors of continuous operation in harsh environments without significant degradation, reducing the need for frequent replacements and maintenance.
5. Applications
- Chemical Industry: Used in chemical reactors, distillation columns, and pipelines for transporting corrosive chemicals. The corrosion resistance of the stainless steel ensures the integrity of the system and prevents contamination of the products.
- Oil and Gas Industry: Employed in refineries, offshore platforms, and onshore pipelines for handling oil, gas, and petroleum products. The high - pressure - bearing capacity and durability of the flanges are essential for safe and efficient operation in this demanding industry.
- Power Generation: In power plants, these flanges are used in steam turbines, boilers, and heat exchangers. Their ability to withstand high temperatures and pressures, along with their corrosion resistance, makes them suitable for the harsh operating conditions in power generation facilities.
- Food and Beverage Industry: The hygienic nature of stainless steel makes these flanges ideal for use in food processing and beverage production. They meet strict hygiene standards and prevent contamination, ensuring the safety and quality of the products.
6. Quality Assurance
- Manufacturing Processes: These flanges are produced using advanced manufacturing techniques, including forging, machining, and heat treatment. Forging helps to improve the mechanical properties of the stainless steel by aligning the grain structure, while machining ensures precise dimensions. Heat treatment can be used to enhance the strength and toughness of the flanges.
- Quality Control: Rigorous quality control measures are implemented throughout the manufacturing process. This includes inspections of the chemical composition, dimensional accuracy, and mechanical properties of the flanges. Non - destructive testing methods such as ultrasonic testing, magnetic particle inspection, and liquid penetrant testing are used to detect any internal or surface defects. In addition, pressure testing is conducted to ensure that the flanges can withstand the specified ANSI 300 pressure rating.
- Certifications: Reputable manufacturers of ANSI B16.5 ANSI 300 stainless steel flanges often obtain certifications such as ISO 9001 for quality management systems and compliance with relevant industry standards. These certifications provide assurance to customers that the flanges meet the highest quality and performance requirements.
Product Description
| Equipment |
| 3-axis, 4-axis and full 5-axis processing equipment, CNC lathe, centering machine, turning and milling compound, wire cutting, EDM, grinding, etc |
| Processing |
| CNC machining, CNC Turning, CNC Milling, Welding, Laser Cutting, Bending, Spinning, Wire Cutting, Stamping, Electric Discharge Machining (EDM), Injection Molding |
| Our Advantages |
|
|
1)24 hours online service & Quickly Quote/Delivery.
2)100% QC quality inspection before delivery, and can provide quality inspection form.
3)10+ years of experience in the CNC machining area and have a senior design team to offer perfect modification suggestions |
| Quality Assurance |
| 100% Inspect Before Shipment, ISO9001:2015, ISO13485:2016, SGS, RoHs, TUV |
| Serface Treatment |
Aluminum parts:Clear Anodized, Color Anodized, Sandblast Anodized, Chemical Film, Brushing, Polishing
Stainless Steel parts:Polishing, Passivating, Sandblasting, Laser engraving, Electrophoresis black, Oxide black
Steel parts:Zinc Plating, Oxide black, Nickel Plating, Chrome Plating, Carburized, Heat treatment
Brass parts:Nickel Plating, chrome plating, Electrophoresis black, Oxide black, Powder coated |
Technical Details
Pressure-Temperature Rating
The pressure-temperature rating is the maximum allowable working pressure (bar unit) of the material and grade used at the rated temperature (Celsius).
Temperature Consideration
Whether flange joints are used at high or low temperatures, leakage due to external forces and moments generated by the connected piping or equipment should be considered. To prevent leakage, pipe flanges and flanged fittings should avoid the application of severe external loads and sharp thermal gradients.
High Temperature
Application at temperatures in the creep range will result in decreasing bolt loads as relaxation of flanges, bolts, and gaskets takes place. Flanged joints subjected to thermal gradients may likewise be subject to decreasing bolt loads. Decreased bolt loads diminish the capacity of the flanged joint to sustain loads effectively without leakage. At temperatures above 200°C (400°F) for Class 150 and above 400°C (750°F) for other class designations, flanged joints may develop leakage problems unless care is taken to avoid imposing severe external loads, severe thermal gradients, or both.
Low Temperature
Some materials, especially some carbon steel materials, exhibit a significant decrease in ductility when used at low temperatures, and thus cannot withstand impact load, sudden stress changes, and high stress concentrations. Some regulations require an impact test even when the temperature is above -29 °C (−20°F).
Production Line
Packaging & Shipping
Pressure Test
No pressure test is required on the flange.
Flanged fitting should be tested for shell pressure.
Shell Pressure Test for Flanged Fittings
The shell pressure test for flanged fittings shall be at a pressure no less than 1.5 times the 38°C (100°F) pressure rating rounded off to the next higher 1 bar (25 psi) increment.
Test Conditions
The shell pressure test for flanged fittings shall be at a pressure no less than 1.5 times the 38°C (100°F) pressure rating rounded off to the next higher 1 bar (25 psi) increment
Test Duration
FAQ
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