Flanges technical specification
Flange MaterialCarbon steelASTM A105. ASTM A350 LF1. LF2, LF6, S235JRG2, P245GH,P250GH, P280GH, etc
16MN, 20MN ,20# etc.
Stainless steelASTM A182, F304/304L, F316/316L etc.
Alloy steelASTM A182,F1,F5,F9,F11,F22 etc.
Flange StandardANSI /ASME B16.5/16.47Class 150 - Class 2500
API 6AClass 2000 -20000
AWWA C207Class B-F
DINPN1 -PN400
BS6Bar 10Bar 16Bar 25Bar 40Bar
EN 1092-1PN2.5 - PN400
GOST12820,12821, 33259-2015PN6- PN400
JIS B22205K - 40K
AS2129Table A, B, E,F,H,G,K,R,S.T.
Flange Size1/2" -200" / DN10-DN500
Flange TypeWelding neck , Slip on, Blind , Long welding neck, Lap joint,
Socket, Threaded ,Flat, custom-made.
Flange SurfaceAnti-rust oil, transparent paint , Black paint, Yellow paint, hot-dipped Galvanized, electrical galvanized, Dacromet
ConnectionWelding, Threaded,Lap joint
TechnicalForged
Flange PackageStandard export packaging (Plywood Case Outside, Plastic film lining Inside).
At Customers' Requirements
Flange Heat TreatmentNormalizing, Annealing, Quenching+Tempering
Flange ApplicationsPetrochemical & Gas industry,Shipbuilding industry, Power industry, Valve industry,Water works, and general pipes connecting projects etc.
Forged Flanges:
Dimension Standard: ANSI B16.5 1/2鈥?24鈥?nbsp; CLASS 150-2500
ANSI B16.47 26鈥?60鈥?nbsp; CLASS 75-900
API 6A 1-13/16鈥?30鈥?CLASS 2000-20000
AWWA C207 4鈥?144鈥?nbsp; CLASS B-F
DIN/BS/JIS 10-4000mm PN2.5-40
Material: Carbon Steel, Alloy Steel and Stainless Steel.
Type: Flat, Slip on, Blind, Welding Neck, Threaded, Lapped, Orifice, Figure 8 Blind, Swivel and etc, we can produce as per buyer鈥檚 special requirements
We can manufacture Spectacle Blind Flange with different type of joint face (RF, FF, RTJ) in series 150/300/600/900/1500/2500 in according to major dimensional standards ASME B16.48.
spectacle blind Flange ,also known as figure 8 Flange which is combination of the two that can be rotated to function as Single Bind or a Ring Spacer. This kind of flange is generally a piece of metal than is cut to fit between two pipe flanges and usually sandwiched between two gaskets a spectacle blind is often made from two metal discs that are attached to each other by a small section of steel. The Sharp is similar to a pair of glasses or spectacles 鈥?hence the name spectacle blind flange. One end of the blind will have an opening to allow flow through the pipe during operation and the other end is solid to block flow during maintenance. They are generally installed as a permanent device to separate process piping system.
The whole idea of a spectacle blind Flange is so that one can be absolutely sure that an item of equipment is properly and securely blanked off with no possibility of any flow or leakage through a valve during maintenance. The flow can be diverted to other items of equipment but not just by passed around the blank as this would compromise the safety function of the spectacle blind. The flow has to valve off and pressure relieved prior to loosening flange bolts and swinging the blind.
Spectacle Blind Flange may have a different type of joint face (RF Raised Face, FF Flat Face, RTJ Ring Joint), depending the type of flange
Spectacle Blind Flange is usually used on the oil line with two different functions:
If the spade is put in between the flanges, it stops the fluid鈥檚 passage;
If the spacer is put in between the flanges, the passage of the fluid is allowed.
The Spectacle Blind is inserted between two flanges: in order to guarantee a perfect waterlight two gaskets are normally mounted , one on each side of spectacle blind.Flanges
website:http://www.flanges-fittings.com/flanges/