TOBO STEEL GROUP CHINA
| Payment Terms | MoneyGram, MoneyGram, Western Union, T/T, D/A, L/C, D/P |
| Supply Ability | 10000Pcs/month |
| Delivery Time | 15-25days |
| Packaging Details | the wooden case |
| Product Name | Blind flange |
| Usage | industry |
| Materials | Nickel Alloy Metal |
| Inspection | Mechinical Property Inspection |
| Port | Shanghai, Ningbo, Etc. |
| Weight | Varies by size and type |
| Useage | Oil/Water |
| Standard Or Nonstandard | SASME B16.5 |
| Section Shape | Round |
| Corrosionresistance | High |
| Tolerance | ±1% |
| Heattreatment | Normalized, Quenched and Tempered |
| Color | Silver |
| Connection | Welded or Threaded |
| Marking | According To The Customer's Requests |
| Surfacefinish | Machined, Painted, Galvanized |
| Brand Name | TOBO |
| Model Number | Alloy Steel Flanges |
| Certification | ISO/TUV/SGS |
| Place of Origin | Shanghai, China |
View Detail Information
Explore similar products
Custom Corrosion Resistant High Pressure Stainless Steel Socket Welding Flanges
Alloy Steel Slip On Flange Raised Face A182 Grade F12 Forged Steel Flange Pipe
Forged Flange Stainless Steel 3'' 900LB WN Flanges ASME B16.5 ASME UNSS32205
ASME B16.5 Alloy Steel RF RTJ Flange Forging Class150 300 600 1500 Slip On
Product Specification
| Payment Terms | MoneyGram, MoneyGram, Western Union, T/T, D/A, L/C, D/P | Supply Ability | 10000Pcs/month |
| Delivery Time | 15-25days | Packaging Details | the wooden case |
| Product Name | Blind flange | Usage | industry |
| Materials | Nickel Alloy Metal | Inspection | Mechinical Property Inspection |
| Port | Shanghai, Ningbo, Etc. | Weight | Varies by size and type |
| Useage | Oil/Water | Standard Or Nonstandard | SASME B16.5 |
| Section Shape | Round | Corrosionresistance | High |
| Tolerance | ±1% | Heattreatment | Normalized, Quenched and Tempered |
| Color | Silver | Connection | Welded or Threaded |
| Marking | According To The Customer's Requests | Surfacefinish | Machined, Painted, Galvanized |
| Brand Name | TOBO | Model Number | Alloy Steel Flanges |
| Certification | ISO/TUV/SGS | Place of Origin | Shanghai, China |
| High Light | ASME B16.5 blind flange ，Class 150 alloy steel flange ，leak prevention blind flange | ||
Leak Prevention Space Saving Blind flange ASMEB16.5 Class150
A blind flange, also known as a blind flange, is essentially a solid disk with no center hole, designed to be bolted onto a pipe or vessel flange . Its primary function is to block off sections of a piping system. Unlike a pipe cap, a blind flange is secured with bolts, making it easy to install and remove for maintenance or system modification . There is also a special type called a spectacle blind flange (or figure-8 blind), which has a solid end for isolation and a ring end for flow, allowing for easy switching between operational and isolated states .
The design and manufacturing of blind flanges are governed by various international standards to ensure safety and compatibility. Key parameters include:
| Parameter | Details & Examples |
|---|---|
| Pressure Ratings | Common ratings include PN 10 and PN 16 . Standards like GB/T 4450-2008 cover flanges for pressures up to 1.6 MPa . |
| Size Range | Available in a wide range of diameters, from as small as DN 15 up to large sizes like DN 2000 or even larger, with some suppliers offering up to 200 inches . |
| Materials | Made from various materials including carbon steel (e.g., Q235, ASTM A105), alloy steel, stainless steel (e.g., 304), and plastic . |
| Standards | Conforms to various national and international standards such as GB/T (China), DIN (Germany), ASME (USA), and industry-specific standards like SH/T for petrochemicals . |
| Temperature Range | Operating temperatures can vary; for example, spectacle blinds per DIN 86042 are used up to 120 °C , while others per GB/T 4450 can handle temperatures up to 300 °C . |
Blind flanges are critical for safety and maintenance in numerous industries:
Isolation for Maintenance: They provide a reliable, sealed barrier to temporarily isolate a section of a pipeline. This allows for safe inspection, cleaning, or repair of equipment like valves, pumps, and vessels without draining the entire system . Their robust sealing performance makes them a preferred isolation method .
Pipeline Termination: Used to permanently or temporarily seal the end of a piping system .
Wide Industry Use: They are versatile components found in:
Shipbuilding: Used in systems like fuel lines, ballast water, and ventilation .
Petrochemical & Oil Refining: Standards like SH/T3425-2011 govern their use in steel pipelines for this sector .
Power Generation: Isolate sections in boiler and steam systems to prevent leaks and ensure safety during upkeep .
Water Treatment & Public Utilities: Employed in municipal water supply and wastewater treatment plants to manage flow and facilitate equipment servicing .
Other Sectors: Also common in paper manufacturing, mining, pharmaceuticals, and food processing .
I hope this overview provides a clear understanding of blind flanges. If you have more specific questions regarding a particular standard or application, feel free to ask
Q1. Are you a factory or trade company? We are a factory located in Dong guan China. We also have Sales office in Dongguan. Welcome to visit our factory.
Q2. What kind of production service do you provide? CNC lathe, CNC Turning, Swiss Turning, CNC Milling, CNC Cutting, CNC Drlling, CNC Machining,, EDM, Wire Cut and Assembly.
Q3. How about the lead time? Sample: 7 days Mass production: 2-3 weeks
Q4. How about your quality? We do FAI for all the 1st Article. We will 100% inspect the products before shipment. Transactions can be through Alibaba's trade assurance.
Q5. What is the RFQ information to quote a Stainless Steel Flange? Drawings or Sample, Material, Finish, and Quantity.
Q6. Can you make flanges based on our samples? Yes, we can make measurement based on your samples.
Q7. What is your payment term and trade terms? Mold: 50% prepaid, balance after sample approval.Goods: 50% prepaid, balance T/T before shipment. We do EXW, FCA, FOB Shenzhen ,CIF, DAP, DDP.
Company Details
Business Type:
Manufacturer,Agent,Importer,Exporter,Trading Company,Seller
Year Established:
1998
Total Annual:
3,000,000-10,000,000
Employee Number:
200~300
Ecer Certification：
Verified Supplier
TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicia... TOBO GROUP sales head offce in Shanghai. We are one of the Professional manufacturers Exporter Pipeline products in China .Our company was established in 1998, the plant covers 550, 000 square meters and a construction area of 6,8,000square meters, existing 260 workers and 45 technicia...
Get in touch with us
Leave a Message, we will call you back quickly!