What are Bleed Rings?
Bleed rings, also known as drip rings, vent rings, drain rings, pressure relief rings, sampling rings or test inserts, are small components that are typically attached to piping or other equipment in a piping system. Their primary function is to allow controlled release of liquids or gases from the system, which can be used for a variety of purposes.
A common use for vent rings is to allow the venting of gases or vapors that may accumulate in a piping system. This helps prevent excessive system pressure that could lead to leaks, damage or other problems. Vent rings can also be used to release liquids or gases for testing or sampling, allowing engineers and technicians to monitor the condition of the system and make any necessary adjustments. In addition to their practical benefits, vent rings can help improve the overall safety of a piping system. By allowing the controlled release of gases and liquids, they can help prevent dangerous pressure buildup or other hazards. They can also make it easier to monitor and control fluid flow within the system, which can help prevent accidents or leaks.
Advantages of Bleed Rings
These rings are designed to provide a controlled release of pressure or fluid from a piping system or vessel, preventing overpressure and ensuring safe and efficient operation. Vent rings are an important part of many piping systems and their unique benefits make them an essential component of many industrial processes. A major benefit of bleed rings is their ability to help maintain pressure equilibrium in a piping system. By allowing a controlled release of fluid, bleed rings prevent excessive pressure buildup in the system, which can be dangerous and cause damage to piping or equipment. Another advantage of bleed rings is their ability to improve the overall efficiency of the system. By allowing controlled release of fluid, bleed rings can help prevent leaks and spills, which can waste valuable resources and lead to costly downtime. Bleed rings are a valuable tool for a range of piping systems, offering the benefits of improved pressure control, increased efficiency and reduced risk of leaks and spills. A bleed ring can be used in place of an orifice flange fitting. It is easier to install and less expensive than installing orifice flanges, especially in brownfield applications.
What are the different types of bleed rings?
Bleed rings are used in various types of machinery to control the flow of fluids or gases. Some common types of bleed rings include: Vane bleed rings, which use a series of vanes or blades to regulate fluid flow. These are commonly used in compressors and pumps. Orifice bleed rings, which use a small hole or opening to control the flow of fluid. These are commonly used in gas turbines and other high-pressure systems. Labyrinth bleed rings, which use a series of channels or passages to control the flow of fluid. These are commonly used in pumps and valves.
The bleed ring is divided into threaded bleed ring according to the connection mode, and socket welded bleed ring:
Threaded bleed ring, which is a type of device used in hydraulic systems to control the flow of fluid. It is typically installed in a hydraulic cylinder or other component and has threads that allow it to be securely attached. The purpose of the bleed ring is to allow excess fluid to be released from the system, which can help prevent damage from overpressure and other issues. Socket bleed ring, which is a type of bleed ring that is designed to be inserted into a socket or other receptacle in the hydraulic system. It may have a different shape or design than a threaded bleed ring, but it serves the same basic purpose of allowing excess fluid to be released from the system. Drip rings are an important component in many types of machinery, and are designed to ensure the safe and efficient operation of the system.
Material of Bleed Rings
Typically, vent rings are made of strong and durable materials, such as stainless steel, alloy steel or other metals, to withstand the high pressures and temperatures encountered in hydraulic systems.
- Stainless Steel Bleed Ring: ASTM A 182, A 240 F 304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L.
- Duplex & Super Duplex Steel Bleed Ring: ASTM / ASME A/SA 182 F 44, F 45, F51, F 53, F 55, F 60, F 61.
- Carbon Steel Bleed Ring: ASTM / ASME A/SA 105 ASTM / ASME A 350 , ASTM A 181 LF 2 / A516 Gr.70 A36, A694 F42, F46, F52, F60, F65, F706.
- Low Temperature Carbon Steel Bleed Ring: ASTM A350, LF2, LF3.
- Alloy Steel Bleed Ring: ASTM / ASME A/SA 182 & A 387 F1, F5, F9, F11, F12, F22, F91.
- Copper Alloy Steel Bleed Ring: ASTM SB 61 , SB62 , SB151 , SB152 UNS No. C 70600 (Cu-Ni 90/10), C 71500 (Cu-Ni 70/30), UNS No. C 10100, 10200, 10300, 10800, 12000, 12200.
- Nickel Alloy Bleed Ring: ASTM SB564, SB160, SB472, SB162 Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020).
Size of Bleed Rings
The size of the bleed inserts depends on the specific application used and the size of the hole or opening to be sealed. Typically, the size of the relief ring depends on the size of the hydraulic system used and the specific design requirements of the system. Some common sizes of relief rings include 1/2″, 1″, 2″ and 4″, but larger and smaller sizes are also available. To ensure that the bleed ring works properly and provides the required level of protection for your hydraulic system, it is important to select the right size bleed ring for your specific application, as a drain ring that is too small may not effectively seal the bore, and a bleed ring that is too large can damage the machine or equipment.
Dimensions of Bleed Rings
In general, bleed rings are designed to be slightly larger than the component they are intended to be used with, so that there is a gap between the two that allows air or fluid to flow through. The exact dimensions of a bleed ring will depend on the specific requirements of the application it is being used in. Outside Diameter and Inside Bore of Threaded Bleed Ring or Socket Bleed Ring 
| Pipe Size | ASME-ANSI Class Dimension | B (Inside BORE-IN) | |||||
| (NPS) | A (Outside Diameter – IN) | ||||||
| 150 | 300 | 600 | 900 | 1500 | 2500 | ||
| 1/2 | – | – | – | – | – | – | – |
| 3/4 | – | – | – | – | – | – | – |
| 1 | 2 1/2 | 2 3/4 | 2 3/4 | 3 | 3 | 3 1/4 | 1 1/8 |
| 1 1/4 | 3 2 7/8 | 3 1/8 | 3 1/8 | 3 3/8 | – | – | 1 1/2 |
| 1 1/2 | 3 1/4 | 3 5/8 | 3 5/8 | 3 3/4 | 3 3/4 | 4 1/2 | 1 5/8 |
| 2 | 4 | 4 1/4 | 4 1/4 | 5 1/2 | 5 1/2 | 5 5/8 | 2 1/8 |
| 2 1/2 | 4 3/4 | 5 | 5 | 6 3/8 | – | 6 1/2 | 2 1/2 |
| 3 | 5 1/4 | 5 3/4 | 5 3/4 | 6 1/2 | 6 3/4 | 7 5/8 | 3 1/8 |
| 3 1/2 | 6 1/4 | 6 3/8 | 6 1/4 | – | – | – | 3 5/8 |
| 4 | 6 3/4 | 7 | 7 1/2 | 8 | 8 1/8 | 9 1/8 | 4 1/8 |
| 5 | 7 5/8 | 8 3/8 | 9 3/8 | 9 5/8 | 9 7/8 | 10 7/8 | 5 1/8 |
| 6 | 8 5/8 | 9 3/4 | 10 3/8 | 11 1/4 | 11 | 12 3/8 | 6 1/8 |
| 8 | 10 7/8 | 12 | 12 1/2 | 14 | 13 3/4 | 15 1/8 | 8 |
| 10 | 13 1/4 | 14 1/8 | 15 5/8 | 17 | 17 | 18 5/8 | 10 1/8 |
| 12 | 16 | 16 1/2 | 17 3/4 | 19 1/2 | 20 3/8 | 21 1/2 | 12 |
| 14 | 17 5/8 | 19 | 19 1/4 | 20 3/8 | 22 5/8 | – | 13 1/4 |
| 16 | 15 1/4 | 21 1/8 | 22 | 22 3/8 | 25 1/8 | – | 15 1/4 |
| 18 | 21 1/2 | 23 3/8 | 24 | 25 | 27 5/8 | – | 17 1/4 |
| 20 | 23 3/4 | 25 5/8 | 26 3/4 | 27 3/8 | 29 5/8 | – | 19 1/4 |
| 22 | – | – | – | – | – | – | – |
| 24 | 28 1/8 | 30 3/8 | 31 | 32 7/8 | 35 3/8 | – | 23 1/4 |
Dimensions of RTJ Bleed Rin
| Line Size | DIMENSIONAL DATA | |||||||||||
| 300# / 400# / 600# | 900# | 1500# | 2500# | |||||||||
| A | B | RING | A | B | RING | A | B | RING | A | B | RING | |
| 1″ | 2.75 | 1.32 | R-16 | 2.812 | 1.32 | R-16 | 2.812 | 1.32 | R-16 | 3.25 | 1.32 | R-18 |
| 1-1/2″ | 3.562 | 1.9 | R-20 | 3.625 | 1.9 | R-20 | 3.625 | 1.9 | R-20 | 4.5 | 1.9 | R-23 |
| 2″ | 4.25 | 2.375 | R-23 | 4.875 | 2.375 | R-24 | 4.875 | 2.375 | R-24 | 5.25 | 2.375 | R-26 |
| 2-1/2″ | 5 | 2.875 | R-26 | 5.375 | 2.875 | R-27 | 5.375 | 2.875 | R-27 | 5.875 | 2.875 | R-28 |
| 3″ | 5.75 | 3.5 | R-31 | 6.125 | 3.5 | R-31 | 6.625 | 3.5 | R-35 | 6.625 | 3.5 | R-32 |
| 4″ | 6.875 | 4.5 | R-37 | 7.125 | 4.5 | R-37 | 7.625 | 4.5 | R-39 | 8 | 4.5 | R-38 |
| 6″ | 9.5 | 6.625 | R-45 | 9.5 | 6.625 | R-45 | 9.75 | 6.625 | R-46 | 11 | 6.625 | R-47 |
| 8″ | 11.875 | 8.625 | R-49 | 12.125 | 8.625 | R-49 | 12.5 | 8.625 | R-50 | 13.375 | 8.625 | R-51 |
| 10″ | 14 | 10.75 | R-53 | 14.25 | 10.75 | R-53 | 14.625 | 10.75 | R-54 | 16.75 | 10.75 | R-55 |
| 12″ | 16.25 | 12.75 | R-57 | 16.5 | 12.75 | R-57 | 17.25 | 12.75 | R-58 | 19.5 | 12.75 | R-60 |
Dimensions and Weight of RF Facing Bleed Rin
| SIZE | B | A (Inch ) | APPROXIMATE WEIGHTS (LBS) | |||||||||
| Class | Class | |||||||||||
| Inch | mm | 150 | 300 | 600 | 900 | 1500 | 150 | 300 | 600 | 900 | 1500 | |
| 1″ | 1.25 | 31.75 | 2 1/2 | 2 3/4 | 2 3/4 | 3 | 3 | 2 | 2 | 2 | 3 | 3 |
| 1-1/2″ | 1.75 | 44.45 | 3 1/4 | 3 5/8 | 3 5/8 | 3 3/4 | 3 3/4 | 3 | 3 | 3 | 4 | 4 |
| 2″ | 2.25 | 57.15 | 4 | 4 1/4 | 4 1/4 | 5 1/2 | 5 1/2 | 4 | 5 | 5 | 9 | 9 |
| 2-1/2″ | 2.75 | 69.85 | 4 3/4 | 5 | 5 | 6 3/8 | 6 3/8 | 5 | 6 | 6 | 11 | 11 |
| 3″ | 3.25 | 82.55 | 5 1/4 | 5 3/4 | 5 3/4 | 6 1/2 | 6 3/4 | 6 | 8 | 8 | 11 | 12 |
| 4″ | 4.25 | 107.95 | 6 3/4 | 7 | 7 1/2 | 8 | 8 1/8 | 9 | 11 | 13 | 16 | 16 |
| 6″ | 6.25 | 158.75 | 8 5/8 | 9 3/4 | 10 3/8 | 11 1/4 | 11 | 12 | 19 | 23 | 30 | 28 |
| 8″ | 8.25 | 209.55 | 10 7/8 | 12 | 12 1/2 | 14 | 13 3/4 | 18 | 27 | 31 | 44 | 42 |
| 10″ | 10.25 | 260.35 | 13 1/4 | 14 1/8 | 12 5/8 | 17 | 17 | 24 | 32 | 47 | 62 | 62 |
| 12″ | 12.25 | 311.15 | 16 | 16 1/2 | 17 3/4 | 19 3/8 | 20 1/4 | 37 | 43 | 57 | 77 | 89 |
Manufacturing Process of Bleed Rings
Bleed rings are components used in fluid handling systems, such as pumps and valves. The manufacturing process for bleed rings typically consists of several steps, including:
- Design and prototyping: The first step in the manufacturing process is to design the bleed ring. This may involve creating a computer-aided layout (CAD) model of the ring and building a prototype to test its performance and ensure it meets the required specifications.
- Material Selection: Once the design is complete, the next step is to select the appropriate material for the bleed ring. This is typically metal, such as steel or aluminum, although other materials may be used depending on the specific application.
- Machining: The selected material is then machined to the exact dimensions required for the vent ring. This may involve turning, drilling, milling, or other machining processes, depending on the complexity of the design.
- Heat Treatment: In many cases, the material used to make the exhaust ring must be heat treated to improve its mechanical properties. This may involve heating the material to a high temperature and then cooling it rapidly, a process called quenching.
- Finishing: After the exhaust ring has been machined and heat treated, it will be finished to improve its surface quality and prepare it for use. This may involve processes such as grinding, polishing, or plating to achieve the desired finish.
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Testing and Inspection: Before the bleeder ring is shipped to the customer, it will undergo a series of tests and inspections to ensure that it meets the required specifications and performance standards. This may include tests such as dimensional accuracy, strength, and corrosion resistance.
Finishes and Drilling of Bleed Rings
All grades and types of bleed rings shall be flat (FF), i.e., without raised or convex surfaces. A serrated concentric or serrated spiral surface with 24 to 55 grooves per inch (0.94 to 2.17 grooves per millimeter) should be used. The radius of the cutting tool used should be 0.06 inches (1.52 mm) or greater. The average roughness (Ra) of the resulting surface finish shall be 125 to 500 μin (3.2 to 12.7 μm), as described in B46.1. Flange faces shall be free of lining and coating materials unless a removable corrosion inhibitor is permitted before installation. Gasket seat surfaces shall not have protrusions. For flanges up to 84″ (2100 mm) in diameter, bolt holes shall be drilled 1/8″ (3.2 mm) larger than the nominal bolt diameter. For flanges with a diameter greater than 84〃 (2100 mm), bolt holes should be drilled 3/16〃 (4.8 mm) larger than the nominal bolt diameter. The bolt hole size may be increased by 1/8″ (3.2 mm) to accommodate the insulator or to facilitate alignment with the mating flange. If the bolt hole is oversized, a washer should be used.
Inspection and measurement of Bleed Rings
One common method of inspecting and measuring bleed rings is to use visual inspection, which involves looking at the bleed ring with the naked eye to check for any obvious defects or abnormalities. This method can be performed by a trained technician or engineer, and may be supplemented with the use of magnifying glasses or other tools to get a closer look at the bleed ring. Another method of inspecting and measuring bleed rings is to use dimensional measurement tools, such as calipers or micrometers, to measure the dimensions of the bleed ring and ensure that it meets the specified tolerances and specifications. This method can be performed using manual or digital measurement tools, and can provide precise and accurate measurements of the bleed ring. In some cases, it may also be necessary to perform functional testing of the bleed ring to ensure that it is functioning properly and controlling the flow of fluid as intended. This can be done by attaching the bleed ring to a fluid handling system and testing it under various operating conditions to see how it performs. Overall, the inspection and measurement of bleed rings is an important part of ensuring that they are functioning properly and meeting the required specifications. By using a combination of visual inspection, dimensional measurement, and functional testing, it is possible to accurately assess the condition of the bleed ring and ensure that it is operating correctly.
Use of Bleed Rings
Some common uses of the bleeder ring include: Bleed excess pressure from piping or vessels to prevent damage or failure. Allow air or gas to escape from the pipe during filling or draining operations. Provide openings for draining or sampling liquids or gases during testing or maintenance. Control the flow of liquid or gas in the pipeline to maintain the desired pressure or flow rate. In addition to practical use, the bleeder ring also has some advantages in terms of safety and efficiency. They can help reduce the risk of accidents or injuries by preventing overpressure, and can also help improve the performance of the pipeline system by ensuring proper flow and pressure control. They are easy to install and maintain and can be used for a wide range of applications.
How to purchase the correct bleed rings?
If you are looking to purchase bleed rings, it is important to first determine what size and type you need for your specific application. Bleed rings are typically used in hydraulic systems to control the flow of fluid and are available in a variety of sizes and designs. To determine the correct size and type of bleed ring for your system, you will need to know the following information:
- The type and size of the fittings or components that the bleed ring will be installed on.
- The operating pressure and temperature of the system.
- The type of fluid that will be flowing through the system.
Once you have this information, you can consult a hydraulic catalog or contact a hydraulic supplier to find the correct bleed rings for your application. They will be able to help you choose the right size and type of bleed ring based on your specific needs.
How to select bleed rings manufacturer?
When choosing a manufacturer for bleed rings, it’s important to consider several factors to ensure that you get a high-quality product that meets your specific needs. Here are some key factors to consider: Experience and expertise: Choose a manufacturer with a proven track record in producing bleed rings. Look for a company with a solid reputation and a history of producing high-quality bleed rings. Product quality: Make sure that the bleed rings you choose are made from high-quality materials and are manufactured to industry standards. Look for rings that are durable, reliable, and able to withstand the pressures and temperatures of your specific application. Customization options: If you have specific requirements for your bleed rings, choose a manufacturer that offers customization options. This will allow you to get exactly the type of bleed rings you need, with the right dimensions, materials, and other specifications. Price: While cost is certainly a factor to consider, it’s important to remember that bleed rings are a critical component of your system, and cheap, low-quality rings can lead to expensive problems down the line. Look for a manufacturer that offers competitive prices without sacrificing quality. Customer service and support: When working with a manufacturer, it’s important to have access to customer service and support. Choose a company that is responsive and willing to help you with any questions or issues that may arise. When choosing a manufacturer for bleed rings, it’s important to consider factors such as experience, product quality, customization options, price, and customer service and support. This will ensure that you get the right bleed rings for your specific needs.
How to order bleed rings?
When Ordering Specify:
- Flange Rating
- Line Size
- Material
- Gasket Surface Type
- Number, Size, & Type of Bleed Holes – Threaded or Socket-Weld
- Specify if requesting Gaskets
- Quantity
- Delivery Time