Blind Flange
| Manufacturing Standards: | ISO, ANSI, DIN, JIS, BS |
| Dimensions | DN10~DN2000 |
| Pressure | ANSI 150LBS~2500LBS JIS 5K~30 K DIN 1Bar~160Bar |
| Material: | WCB、LCB、LC3、WC5、WC9、C5、C12、CA6NM(4)、CA15(4)、CF8M、CF8C、CF8、CF3、CF3M、CN7M、M35-1、N7M、CW6M、CY40。 |
| Coating: | FBE, 3PE, etc. |
USE &APPLICATION
- Commonly used in the following industries:
- architecture
- bridge
- Petrochemical industry
- shipbuilding
- project
- Offshore and onshore services
- Power generation industry
- Food processing industry
- oil and gas industr
Package
- Products are packaged to ensure that there is no damage during transit.
- In case of exports, standard export packaging is done in wooden cases.
- All pipes are marked with Grade, Lot No, Size, Degree and our trade mark.
- On special requests we can also, make custom marking on our products.
- Wooden Boxes
- Wooden Pallets
- Shrink-Wrapped
- Carton Boxes
- Wooden Boxes
Testing
- Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report
- Positive Material Identification - PMI Testing
- Chemical Analysis - Spectro Analysis
- Mechanical Testing Such as Tensile, Elongation, Reduction of Area
- Micro Test
- Macro Test
- Hardness Test
- Pitting Resistance Test
- Intergranular Corrosion (IGC) Test
- Flaring Test
- Flattening Test
- Hydrostatic Test
- Hydrogen-Induced Cracking (HIC) Test, NACE TM0284
- Sulfide Stress Corrosion Cracking (SSC), NACE TM 0177
- Radiography Test
- Dye Penetrant Test (DP Test)
Certification
All materials are strictly inspected at every stage of the production process from procurement to product shipment. Visually inspect them for compliance with ASTM, ASME, MSS, DIN, EN and JIS codes and standards. Support officially certified inspection agencies to witness product material reporting, dimensional and quality compliance. Factory inspections are also supported.
Product Description
Blind flange, also known as tube blind disk, is a form of flange connection. In fact, there is no hole in the middle of the flange.
Blind flange functions is to block the end of the pipeline, and facilitate the role of removing debris in the pipeline during maintenance. In terms of blocking function, it has the same function with head and pipe cap. But the head has no way to dismantle, while the flange blind plate is fixed with bolts, which is very convenient to dismantle. According to materials, blind flange can be classed to carbon steel flange, alloy steel flange, stainless steel flange, copper nickel flange and so on.
Processing method: Cutting flange
Cutting out the flange directly on the center plate leaves the inner and outer diameters of the flange and the thickness of the disk, and then carry out the processing of the bolt holes and the water line. The flanges produced in this way are called cut flanges, and the maximum diameter of such flanges is limited by the width of the center plate.
Rolled flange
The process of cutting strips from the center plate and then rolling them into a circle is called rolling, which is mostly used in the production of some large flanges. After successful rolling, it is can be shaped to weld neck flange, flat face flange, spectacle flange, raised face flange, threaded flange, orifice flange, plate flange and so on.
To production process is mainly divided into four kinds of forging, casting, cutting, rolling.
Casting out of the flange, blank shape and size is accurate, processing is small, low cost, but there are casting defects (porosity, cracks, inclusions); casting internal organization streamline is poor (if it is cutting parts, streamline is worse);Forging flange contains low carbon, generally less prone to rust than casting flange, and forging parts flow pattern is good, the organization is more dense, the mechanical properties are better than casting flange; Improper forging process will also appear grain size or uneven, hardening crack phenomenon, forging cost is higher than casting flange
Advantage
