Flanges Type - SHANXI XINCHANG MINMETALS FORGING & CASTING FLANGES CO.,LTD

Flanges Type

ANSI B 16.5 SLIP-ON RF FF 150-2500LB SIZE:DN15-DN600

Slip-On:
The slip-on flange has a low hub because the pipe slips into the flange prior to welding. It is welded both inside and out to provide sufficient strength and prevent leakage. They are ideal for low pressure applications.

ANSI B 16.5 WELDING NECK RF FF 150-2500LB SIZE:DN15-DN600

Welding neck:
These are the most common type of flanges used for high-pressure application.It is designed to transfer stresses concentrations of the base of the flanges. These are recognized by their long tapered hub. The hub provides an important reinforcement to the flange itself and acts to reduce rotation of the flange at bolt up. The smooth transition between flange and the hub combinbed with the strength of the butt weld joint, allows the flanges to be used in extreme conditions of cyclic loading, bendng and temperature fluctuations.

ANSI B 16.5 SOCKET WELD RF FF 150-2500LB SIZE DN15-DN600

Socket Weld:
These flanges have a bore and counter bore dimension. The counter bore is slightly larger than the O.D of the matching pipes, allowing pipes, allowing the pipe to be inserted into the flanges. The diameter of the smaller bore is the same as the I.D of the matching pipe. During assembly, the pipe is inserted in the larger diameter bore andis welded in place. This type of flange is often used with high-pressure systems that use smaller diameter pipes. These flanges application is in Chemicals, Hydraulics and Steams plants.

ANSI B 16.5 THREADED RF FF 150-2500LB SIZE DN15-DN600

Threaded:
The threaded flange is similar to slip-on flanges, but the difference is that the bore is threaded.It can be fitted to the pipe without welding. It is use in low-pressure services at ambient temperatures, and in highly explosive areas where welding creates a hazard.

ANSI B 16.5 LAP JOINT 150-2500LB SIZE DN15-DN600

Lap Joint:
The lap joint flange is practically identical to a slip-on flange except it has a larger radius at the intesections of the bore and flange face. It is used with their associated stub end. The stub end is welded to the pipe and the lap joint then works as a backjing ring. The advantage of this flange is that the bolt holes can be aligned with the matching flange after the weld have been completed. This flange is not suitable for areas with thigh external or dynamic loads.

ANSI B 16.5 BLIND RF FF 150-2500LB SIZE DN15-DN600

Blind:
The Blind flange is a flange without an opening or bore. It is used to close off the ends of a piping systems and/or a pressure vessel opening. They may often be supplied with NPT fittings to llow pressure test connections to be fitted.

ANSI B 16.36

(ANSI B16.5) FORGED FLANGES

ORIFICE FLANGES are widely usde in conjunction with orifice meters for measuring the rate of flow of liquids and gases. They are basically the same as standard welding neck, slip-on and screwed flanges except for the provision of radial, tapped holes in the flange ring for meter connections and additional bolts to act as jack screws to facilitate separating the flanges for inspection or replacement of the orifice plate.

RTJ Sealing face

Ring Type Joint
This is a method of ensuring leak proof flange connection
at high pressures. A metal ring is compressed into a hexagonal
groove on the face of the flange to make the seal.
Ihis jointing method can be employed on Weld Neck.Slip-on and Blind Flanges.