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ASME B16.47 Series A Class 600 Blind Flanges
Material: Carbon Steel, Stainless Steel, Alloy Steel, Duplex Stainless Steel
Thickness: According to ASME B16.47 Series A Class 600
Standard: ASME B16.47 Series A
Pressure Class: Class 600
Flange Type: Blind Flange
Flange Face Type: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ) upon request
Connection: Bolted Connection
Manufacturing Process: Forging and Machining
ASME B16.47 Series A Class 600 Blind Flanges are large-diameter forged pipeline closure components designed for demanding industrial piping systems.
A blind flange has no central pipe opening and is mainly used to close the end of a piping system or equipment connection. It provides reliable isolation and can be removed when inspection, maintenance, pressure testing, cleaning, or future system modification is required.
These flanges are widely used in oil and gas, petrochemical, power generation, chemical processing, offshore engineering, and other heavy-duty industrial piping systems. The reference page specifically highlights oil and gas, petrochemical, and power generation applications.
ASME B16.47 Series A Class 600 Blind Flange Descriptions
ASME B16.47 Series A Class 600 Blind Flanges are manufactured for large-diameter piping systems according to ASME B16.47 Series A dimensional requirements.
A blind flange, also called a blind plate, has no main pipe opening and is used to close pipeline ends or equipment such as valves and pumps. It can provide isolation, sealing, and convenient access for removing debris or carrying out maintenance.
The flange is secured to a matching flange using bolts, nuts, and an appropriate gasket. This creates a completely closed connection while allowing the flange to be removed when necessary.
Product Parameters
| Parameter | Description |
|---|---|
| Product Name | ASME B16.47 Series A Class 600 Blind Flange |
| Standard | ASME B16.47 Series A |
| Pressure Rating | Class 600 |
| Size Range | NPS 26" – NPS 60" |
| Flange Type | Blind Flange |
| Connection | Bolted Connection |
| Flange Facing | RF, FF, RTJ upon request |
| Material | Carbon Steel, Stainless Steel, Alloy Steel, Duplex Stainless Steel |
| Manufacturing | Forging + Heat Treatment + CNC Machining |
| Surface Treatment | Anti-rust oil, painting, galvanizing or customized coating |
| Inspection | Dimensional Inspection, Visual Inspection, UT, MT, PMI, Hardness Testing |
| Application | Oil & Gas, Petrochemical, Chemical Processing, Power Generation, Offshore and Industrial Pipelines |
ASME B16.47 Series A Class 600 Blind Flange Dimensions
Class 600 Dimensions | ASME B16.47 Series A Flange
Unit: Inch
| Nominal Pipe Size | Outside Diameter (O) | Bolt Circle (W) | Raised Face Diameter (R) | Number of Holes | Diameter of Holes | Minimum Thickness (T) | Approximate Weight (lbs) |
|---|---|---|---|---|---|---|---|
| 26 | 40.00 | 36.00 | 29.50 | 28 | 2.00 | 4.94 | 1760 |
| 28 | 42.25 | 38.00 | 31.50 | 28 | 2.12 | 5.19 | 2061 |
| 30 | 44.50 | 40.25 | 33.75 | 28 | 2.12 | 5.50 | 2423 |
| 32 | 47.00 | 42.50 | 36.00 | 28 | 2.38 | 5.81 | 2858 |
| 34 | 49.00 | 44.50 | 38.00 | 28 | 2.38 | 6.06 | 3237 |
| 36 | 51.75 | 47.00 | 40.25 | 28 | 2.62 | 6.38 | 3800 |
| 38 | 50.00 | 45.75 | 41.50 | 28 | 2.38 | 6.12 | 3405 |
| 40 | 52.00 | 47.75 | 43.75 | 32 | 2.38 | 6.38 | 3838 |
| 42 | 55.25 | 50.50 | 46.00 | 28 | 2.62 | 6.75 | 4585 |
| 44 | 57.25 | 52.50 | 48.25 | 32 | 2.62 | 7.00 | 5105 |
| 46 | 59.50 | 54.75 | 50.25 | 32 | 2.62 | 7.31 | 5758 |
| 48 | 62.75 | 57.50 | 52.50 | 32 | 2.88 | 7.69 | 6737 |
| 50 | 65.75 | 60.00 | 54.50 | 28 | 3.12 | 8.00 | 7695 |
| 52 | 67.75 | 62.00 | 56.50 | 32 | 3.12 | 8.25 | 8425 |
| 54 | 70.00 | 64.25 | 58.75 | 32 | 3.12 | 8.56 | 9333 |
| 56 | 73.00 | 66.75 | 60.75 | 32 | 3.38 | 8.88 | 10,530 |
| 58 | 75.00 | 68.75 | 63.00 | 32 | 3.38 | 9.12 | 11,414 |
| 60 | 78.50 | 71.75 | 65.25 | 28 | 3.62 | 9.56 | 13,108 |
Notes:
- All dimensions are in inches.
- These flanges are furnished with a 1/16" Raised Face unless otherwise specified.
- Other flange facings can be supplied according to project requirements.
- Customized dimensions, coatings, markings, materials, and inspection requirements are available.
Blind Flange
A Blind Flange is a solid flange without a central pipe opening.
Its main purpose is to close or isolate a piping system, valve, pump, pressure vessel, or other equipment connection.
Because it is bolted rather than permanently welded shut, it can be removed for:
- Pipeline inspection
- Cleaning
- Pressure testing
- Maintenance
- Equipment isolation
- Future system expansion
The reference page also notes that blind flanges provide isolation and cut-off functions while offering good sealing performance for systems requiring complete isolation.
Advantages of ASME B16.47 Series A Class 600 Blind Flange
Reliable Pipeline Isolation
The solid flange structure provides complete closure for pipeline ends and equipment connections.
Strong Mechanical Performance
Forged construction provides good strength for demanding large-diameter piping systems.
Reliable Sealing
Precision-machined sealing surfaces provide stable gasket contact and dependable sealing.
Easy Maintenance
The bolted connection allows the flange to be removed when inspection or maintenance is required.
Suitable for Heavy-Duty Systems
Class 600 Blind Flanges are suitable for demanding large-diameter industrial piping applications.
Multiple Material Options
Carbon steel, stainless steel, alloy steel, and duplex stainless steel are available.
Applications
Oil and Gas Industry
Used for pipeline isolation, compressor stations, processing facilities, storage systems, and equipment closure.
Petrochemical Industry
Suitable for process piping, tanks, reactors, pressure vessels, pumps, valves, and heat exchangers.
Chemical Processing
Used to isolate pipelines carrying chemicals, gases, and industrial process fluids.
Power Generation
Applied in cooling water, process water, auxiliary piping, and other large-diameter systems.
Offshore and Marine
Used in offshore platforms, marine piping, seawater systems, and oil and gas production facilities.
Industrial Piping
Suitable for factories, pressure equipment, pumps, valves, machinery, and large industrial piping networks.
PRODUCTION PROCESS
Our ASME B16.47 Series A Class 600 Blind Flanges are manufactured through a controlled production process.
Raw Material Inspection → Cutting → Heating → Forging → Heat Treatment → Rough Machining → CNC Machining → Drilling → Sealing Face Machining → Inspection → Surface Treatment → Marking → Packing
Each production stage is controlled to ensure accurate dimensions, correct bolt-hole arrangements, stable material properties, and reliable sealing surfaces.
Why Choose Us
Experienced Manufacturer
We specialize in forged flange manufacturing for industrial piping systems.
Reliable Quality
Each flange is inspected before shipment.
Multiple Material Options
Carbon steel, stainless steel, alloy steel, and duplex stainless steel are available.
Custom Manufacturing
Customized sizes, facings, coatings, and markings can be supplied.
International Supply
We supply flange products to customers in different industries and global markets.
COMPANY PROFILE
Shanxi HongKai Forging Co., Ltd. is located in Dingxiang County, Shanxi Province, China, an important manufacturing base for forged flanges.
We specialize in the production of forged flanges and industrial forging products for international piping and engineering projects.
Our manufacturing capabilities include:
Forging, Heat Treatment, CNC Machining, Drilling, Testing, Surface Treatment, Marking, Packaging and Shipment.
We manufacture Blind Flanges, Welding Neck Flanges, Slip On Flanges, Socket Weld Flanges, Threaded Flanges, Lap Joint Flanges, and customized forged flanges.
Our products can be supplied according to:
ASME / ANSI / EN / DIN / JIS / AWWA / BS and other international standards.
Available materials include carbon steel, stainless steel, alloy steel, duplex stainless steel, and special material grades.
FAQ
What is an ASME B16.47 Series A Class 600 Blind Flange?
It is a large-diameter solid flange without a central pipe opening, manufactured according to ASME B16.47 Series A Class 600 dimensional requirements.
What sizes are available?
The reference dimensional table covers NPS 26" to NPS 60".
What does Class 600 mean?
Class 600 is an ASME pressure-temperature class designation. Actual allowable working pressure depends on material, temperature, gasket, bolting, and system design.
What materials are available?
Common materials include carbon steel, stainless steel, alloy steel, and duplex stainless steel.
What flange facing is normally supplied?
The reference page states that these flanges are furnished with a 1/16" Raised Face unless otherwise specified.
What is a Blind Flange used for?
It is mainly used to close pipeline ends, isolate piping systems, terminate equipment connections, and provide maintenance or pressure-testing access.
Can customized Blind Flanges be manufactured?
Yes. Customized sizes, holes, materials, facings, coatings, markings, and inspection requirements can be supplied. The reference page also states that customized flange and hole configurations are available.
Where are Class 600 Blind Flanges commonly used?
They are commonly used in oil and gas, petrochemical, power generation, chemical processing, offshore, marine, and other industrial piping systems.
Can inspection certificates be supplied?
Yes. Material certificates, dimensional reports, UT, MT, PMI, hardness testing, and third-party inspection documentation can be supplied when required.
Contact Us
Looking for reliable ASME B16.47 Series A Class 600 Blind Flanges?
Contact our technical team for dimensional confirmation, material selection, customized manufacturing, and quotations.
Shanxi HongKai Forging Co., Ltd.
Address: Cuijiazhuang Industrial Park, Dingxiang County, Shanxi Province, China
Telephone: +86 13716747092
Email: kevin.zhao@hkflange.com
Clear Communication, and Reliable Technical Support