Overview of Stainless Steel Blind Flange
A stainless steel blind flange is a type of pipe flange used to seal the end of a piping system or vessel opening. It is designed without a bore (hole) in the center, making it solid and capable of completely blocking off the flow of fluids or gases. Blind flanges are commonly used in applications where future expansion of the pipeline is anticipated, or for isolation during maintenance, inspection, or testing.
Stainless Steel Blind Flange Mill Test Certificates
Our Mill Test Certificate includes description of flanges such as size,quantity of flanges,heat number and batch number for tracing,material chemical composition and mechanical properties,and also testing result like intergranular corrosion,NACE MR0175 and penetration test.
It is a critical document for quality assurance and traceability in industries where material integrity is paramount, such as oil and gas, chemical processing, and constructio.
Manufacturing Processing
The manufacturing process of a stainless steel blind flange involves several steps to ensure the final product meets the required specifications and standards. Below is a detailed description of the process:
Specification of Stainless Steel Flange
| NPS | Pressure Rating | Material | Standard | Flange Face | |||
| DN15-DN3000 1/2"-120" | Class150- Class2500, PN10 - PN160 | Stainless steel | Duplex Steel | Alloy steel: | ASTM B16.5, ASTM B16.47, MSS SP44, EN1092-1, ASTM A182, JIS B2220, BS 4504, SABS/SANS1123, AWWA C207 | Ring Type Joint (RTJ), Flat Face (FF), Raised Face (RF) | |
| 31254, 904/L 347/H, 317/L 310S, 309 316Ti, 321/H 304/L, 304H 316/L, 316H | UNS S31803, S32205, S32750, S32760 | N04400, N08800 N08810, N08811 N08825, N08020 N08031, N06600 N06625, N08926 N08031, N10276 | |||||
| Other requirements as per customers' design and drawings. | |||||||
Type of packaging
– Wooden box for small diameter flanges
– Iron frame for large diameter flanges
