Welding-Neck Flanges

WELDING NECK FLANGES are distinguished from other types by their long tapered hub and gentle transition of thickness in the region of the butt weld joining them to the pipe. The long tapered hub provides an important reinforcement of the flange proper from the standpoint of strength and resistance to dishing. The smooth transition from flange thickness to pipe wall thickness effected by the taper is extremely beneficial under conditions of repeated bending, caused by line expansion or other variable forces and produces an endurance strength of welding neck flanged assemblies equivalent to that of a butt welded joint between pipes, which, in practice, is the same as that of unwelded pipe. Thus this type of flange is preferred for every severe service condition, whether this results from high pressure or from sub-zero or elevated temperature, and whether loading conditions are substantially constant or fluctuate between wide limits.

Slip-On Flanges

SLIP-ON FLANGES continue to be preferred to welding neck flanges by many users on account of their initially lower cost, the reduced accuracy required in cutting the pipe to length, and the somewhat greater ease of alignment of the assembly; however their final installed cost is probably not much, if any, less than that of welding neck flanges. Their calculated strength under internal pressure is approximately two-thirds that of welding neck flanges, and their life under fatigue is about one-third that of the latter. For these reasons, slip-on flanges are limited to sizes ½" to 2 ½" in the 1500 lb standard and are not shown in the 2500lb standard.

Orifice Flanges

ORIFICE FLANGES are widely used in conjunction with orifice meters for measuring the rate of flow of liquids and gases. They are basically the same as standard welding neck and slip-on 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. In choosing the type of orifice flange, the considerations affecting the choice of welding neck and slip-on standard flanges apply with equal force.

We provides ASME Code and Non Code Industrial flanges for the Petrochemical, Process, & Waterworks industries. ANSI, API, AWWA pipe flanges in carbon, stainless, alloys and chrome steel. Weld Neck flanges, Slip on flanges, Blind flanges, Threaded flanges, socket weld flange, Lap Joint flange, Orifice Flanges in sizes 1/2" to 198". 　

Relate product：stainless flange 01   stainless flange 02   stainless steel Flanges   stainless steel Flanges 02   stainless flange 03   stainless flange 04  stainless steel flange 01   stainless steel flange 02   stainless flange 05   stainless flanges 07 stainless steel Flange

stainless flange / Stainless Steel Flanges:
1) Standard: ANSI / ASTM B16.5, ANSI / ASTM B16.47 SERIES A (MSS SP - 44),
ANSI / ASTM B16.47 SERIES B (API 605), ASTM B16.36, BS10 - 1962, BS4504,
DIN, JIS B2220, UNI standard
2) Material: ASTM A 105, RST 37.2, C22.8, ASTM A182, F304, F316, F316L,
F321 and other type alloy steel

Stainless flange/stainless steel flange

We are manufacturer of stainless steel flange and carbon steel flange.We can supply the forged steel flange with perfect quality and best price.Others can be made according to your requirement
Standards : ANSI, DIN, BS, EN, JIS,JB/T and GB
Material : stainless steel such as 304/304L/316/316L/316Ti/321;

Stainless Steel Flanges

Stainless Steel : ASTM A182 F 304/ 304L/ 304H/ 316/ 316L/ 317/ 317L/ 321/ 310/ 347/ 904L etc.
Engaged in manufacturing and exporting of stainless steel blind flanges, stainless steel flange etc.
Carbon Steel : ASTM A105/ A694 F42/46/52/56/60/65/70/ A350 LF3/ A350 LF2.

Stainless Steel Flange Type: Slip-On, Welding Neck, Blind, Socket Welding, Threaded, Lap Joint and Plate etc.
Pressure Ratings: Class 150, 300, 600, 900, 1500 and 2500
Pressure Ratings: PN 6, PN 10, PN16, PN25, PN40 and PN64
Pressure Ratings: JIS 5K, 10K, 16K and 20K
Materials:Carbon steel, Stainless steel and Alloy steel etc.
Standards:ANSI, API, BS, DIN, UNI, JIS and MSS SP etc.
Size:1/2" ~ 64"(DN15 mm ~ 1600 mm)

Related product as following：
stainless steel flange 03 stainless steel flange 04 stainless steel flange 05 stainless steel flange 06 stainless steel flange 07 stainless steel flange 08 stainless flange 06 stainless flange 07 stainless flange 08 stainless flange