BLIND FLANGES
Blind Flange Manufacturer
What is blind flanges?
S Nomi is proud Blind Flanges Manufacturer in Kolkata, West Bengal, Odisha, Bihar, Jharkhand. A Blind Flanges is a solid flange as shown below. The purpose of these is to block off a section of pipe or a nozzle on a vessel that is not used. (A nozzle is typically a pipe coming out of a vessel and is usually flanged so it can be connected to valves or piping).
Many times a nozzle will be blanked off with a blind flange for pressure tests in a plant, or simply because the customer does not need all the nozzles that were supplied on the tank.
S Nomi is a manufacture of Blind Flanges in different grades and scales. We supply flanges of all types as well. Blind Flanges is used widely in applications where the pipeline has to be terminated. The blind end or the plate of the flange seals the connection so that the flow ends with the Blind Flange. Blind Flanges dependability and performance have created S Nomi leading manufactures, dealers of Stainless Steel Blind Flanges in Kolkata, Bihar, Odisha, Jharkhand & all over India. Each month we tend to supply/export Blind Flanges to Indian port around fifty-two containers to completely different customers. As a leading Blind Flange Manufacture & we supply these flanges in different types of material grade. Our experienced professionals are engaged with us who fabricate these flanges with excellent precision. This is a flange without a bore and is used to shut off a piping system or vessel opening.
Blind Flanges Application & Uses
- Blind Flanges used in Transporting materials
- Stainless Steel Blind Flanges used in the Automotive industry
- Blind Flanges used in Homes and buildings
- Stainless Steel Blind Flanges are used in Sewerage systems and industrial water lines.
- Carbon Steel Blind Flanges are used in heating and air-conditioning equipment.
- Blind Flanges used in Plumbing
- Alloy Blind Flanges used in Food Processing Industry
- Blind Flanges used in the Paper & Pulp Industry
- Blind Flanges used in Food Industry
The main purpose of using a Blind Flanges is to block off a section of pipe or a nozzle on a vessel that has not been used. A nozzle typically is a pipe that comes out of a vessel. Usually, a nozzle is flanged so it could be connected to either valves or piping. Several times, a nozzle will be blanked off with the help of Blind Flanges. This is practiced because of two reasons – i.e. for pressure tests in a plant, or simply since the customer may not want all the nozzles that were supplied on the tank. Typically, the best practice would be to use a standard gasket for these Tapped Blind Flange.
A Blind Flange In Pn16 can be used to stop the flow in a pipeline. This is done with the help of a solid disk since there is no opening controlled in blind flanges, which allows the fluid to pass through. Instead, one placed the Blind Flanges between open flanges creates a block, which effectively causes the flow of a liquid to stop through the pipeline. These Blind Flanges typically have holes that are machined in order to match those of what might be a connecting valve or a flange that could be in that place. we are leading Blind Flange Manufacturer in India
The Blind Flange is used to close ends of piping systems. It is a kind of round plate with no center hold but with all the proper bolt holes. This blind flange is available in various sizes and materials and is used to provide positive closer on the ends of pipes, valves or equipment nozzles. This flange helps in easy access to a line once it has been sealed. The blind flange is sometimes custom made or machined to accept a nominal sized pipe to which reduction is being made. This reduction can be a threaded reduction or welded reduction.
Range
½” (15 NB) to 48″ (1200NB) in 150 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS ASA 150, ASA 300, PN 6,10,16,25, 40,64,100,160 ETC. Available with NACE MR 01-75
Stainless Steel Blind Flanges
Grade : 304, 304L, 304H, 309, 310, 310S, 316, 316Ti, 316 L, 317, 317L, 321, 347, 347 H, 409, 410, 410S, 420, 430L
Duplex Steel Blind Flanges
Grade : 2205 (UNS No. S31803), 2507 (UNS No. S32750)
Nickel Alloy Blind Flanges
Grade : Nickel 200 (UNS No. N02200), Nickel 201 (UNS No. N02201), Monel 400 (UNS No. N04400), Monel 500 (UNS No. N05500), Inconel 800 (UNS No. N08800), Inconel 825 (UNS No. N08825), Inconel 600 (UNS No. N06600), Inconel 625 (UNS No. N06625), Inconel 601 (UNS No. N06601), Hastelloy C 276 (UNS No. N10276), Alloy 20 (UNS No. N08020), Titanium (Grade I & II)
Copper Alloy Blind Flanges
Grade : UNS No. C 10100, 10200, 10300, 10800, 12000, 12200, 70600, 71500, UNS No. C 70600 (Cu -Ni- 90/10), C 71500 (Cu -Ni- 70/30)
Variations:
- Face finish : Raised face (RF) – Flat face (FF) – RTJ – …
- Variations : Spectacle Blind
Standards:
- ASTM A182 – ASME SA182 – ‘Standard Specification for Wrought Austenitic Stainless Steel Piping Fittings’
- ASME B16.5 – ‘Pipe Flanges and Flanged Fittings’
- ASME B16.36 – ‘Orifice Flanges’
- ASME B16.47 – ‘Large Diameter Steel Flanges NPS26 Through NPS60’
- MSS SP-6 – ‘Standard Finishes for Contact Faces of Pipe Flanges and Connecting End Flanges of Valves and Fittings’
Dimensions
Diameter : 1/2″ à 24″
Pressure class : 150# – 300# – 600# – 1500#
Grades : F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H,904L Duplex stainless steel UNS S31803, 2205, Super Duplex stainless steel UNS S32750
Class:
Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500
Features of blind flanges:
- Some important features of blind flanges are as follows:
- Blind flanges are sometimes supplied with NPT fittings which allow pressure test connections to be fitted.
- They are used to blank off the ends of pipe.
- They are also used to blank off the ends of valves and pressure vessel opening.
- Considering factors like internal pressure and bolt loading, blind flanges, especially in the larger sizes, are the most highly stressed of all types of flanges.
- Since the maximum stresses in a blind flange are bending stresses at the center, they can safely be allowed to be higher than in other types of flanges
- Blind flanges are made to fit standard pipes in all sizes..
Notes :
- Flange dimensions to ANSI to B16.5.
- Dimensions “D” includes raised face thickness.
- Larger outlet sizes available on applications.
- ANSI 150# / 300# 2mm Raised Face.
- ANSI 600# / 2500# 7mm Raised Face.
