Blind Flange
Blind flanges are used to seal the end of pipeline or pressure vessel openings. They also allow for easy access into the pipe in case operation must be done inside the pipeline. Face of the flange is available in diversified types, such as raised face, flat face, ring joint, etc. Industrial blind flanges are mainly manufactured with die stamping and machining techniques.
The complex manufacturing technique in forging flanges proposes high technical requirements for our operation. Blind flanges made by Yuanyang are distinguished for low carbon content, rust-proof, sleek shape, dense structure, and large shear and tensile force bearing capacity.
Different from other pipe fittings, the inspection process for blind flange should be done simultaneously during the production process. It involves both the quality of flanges and the working progress of machine, putting forward high requirements for operators’ skills and proficiency. Yuanyang possesses over 60 qualified and experienced inspectors to provide powerful guarantee for a reliable quality.
Production Range| Type | Nominal diameter | Pressure | |
| Flange America standard | 1/2"~100" | DN15-DN2500 | Class150~Class2500 |
| Flange Europe standard | 1/2"~100" | DN15-DN2500 | PN2.5~PN400 |
| Austenitic stainless steel | Super duplex stainless steel | Nickel-based alloy steel | Carbon steel/alloy steel | Other materials |
| 304 304L 304H 304LN | S31803 S32205 | N10276 N04400 N06600 | Q235 20# 20G | TA1 TA2 TA3 TC1~TC9 |
| 316 316L 316H 316Ti | S32304 S32760 | N06600 N06625 N06690 | WPB A105 16Mn | LF2 LF3 LF5 LF6 LF10 |
| 310S 321 321H 347 | S32550 S32750 | N08800 N08825 N08904 | 45# 15CrMo | Al, Ti, martensite |
| S31254 | S33400 | N08020 N08810 N08811 | A350LF2 A420Gr.WPL6 |
| Steel pipe flange for petrochemical use: | SH3406 |
| Blind flange for steel pipes in petrochemical field: | SH3425 |
| Steel pipe flange, washer, fasteners (PN series): | HG/T20592 |
| Steel pipe flange (CLASS series): | HG/T20615 |
| Large-diameter steel pipe flange (CLASS series): | HG/T20623 |
| Steel pipe flanges: | GB/T9124 |
| Pipe flanges and flange fittings: | ASME B16.5 |
| Large-diameter steel flange: | ASME B16.47 |
| Forged or rolled pipe flange, forged pipe fittings, valves and accessories: | ASTM A182/A182M |
| Cast steel flange fittings: | EN 1092 |
| Steel pipe flange: | JIS B2220 |
Our company can provide blind pipe flanges according to custom need materials like austenitic stainless steel, duplex stainless steel, carbon steel and alloy steel listed as follows:
304 stainless steel blind flange
304L stainless steel blind flange
304H stainless steel blind flange
304LN austenitic stainless steel blind flange
316 stainless steel blind flange
316L stainless steel blind flange
316H stainless steel blind flange
316Ti stainless steel blind flange
310S stainless steel blind flange
321 stainless steel blind flange
321H stainless steel blind flange
347 stainless steel blind flange
S31254 austenitic stainless steel blind flange
S31803 duplex stainless steel blind flange
S32205 duplex stainless steel blind flange
S32304 duplex stainless steel blind flange
S32760 duplex stainless steel blind flange
S32550 duplex stainless steel blind flange
S32750 duplex stainless steel blind flange
S33400 stainless steel blind flange
N10276 Nickel alloy blind flange
N04400 Nickel alloy blind flange
N06600 Nickel alloy blind flange
N06625 Nickel alloy blind flange
N06690 Nickel alloy blind flange
N08800 Nickel alloy blind flange
N08825 Nickel alloy blind flange
N08904 Nickel alloy blind flange
N08020 Nickel alloy blind flange
N08810 Nickel alloy blind flange
N08811 Nickel alloy blind flange
Q235 carbon steel blind flange
20# carbon steel blind flange
20G carbon steel blind flange
WPB carbon steel blind flange
A105 carbon steel blind flange
16Mn steel blind flange
45# carbon steel blind flange
15CrMo alloy steel blind flange
A350 LF2 carbon steel blind flange
A420 grade WPL6 carbon steel blind flange
TA1 titanium blind flange
TA2 titanium blind flange
TA3 titanium blind flange
TC1—TC9 titanium alloy blind flange
LF2 alloy steel blind flange
LF3 alloy steel blind flange
LF5 alloy steel blind flange
LF6 alloy steel blind flange
LF10 alloy steel blind flange
Martensite stainless steel blind flange
