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Stainless Steel Weld Neck Flange

Description

Stainless Steel Flanges Specifications:ASTM A182 / ASME SA182

Size:1/2″(15 NB) to 48″

Standards:ANSI/ASME B16.5, B 16.47 Series A & B, B16.48, BS4504, BS 10, EN-1092, DIN, etc.

Class / Pressure rating:150#, 300#, 600#, 900#, 1500#, 2500#, PN6, PN10, PN16, PN25, PN40, PN64 etc.

ASTM A182 for alloy and stainless welding neck flange. Alloy for F11, F22, stainless for F304/F304L, F316/F316L

The Welding neck flanges is normally referred to as the high hub flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange.

It is compatible to the pipelines that works in high or low temperature and bear high pressure. Specially for the pipe or the valves when PN is larger than 2.5 Mpa.


Weld neck flange datasheets

Class

Flat Face

Raised Face

Ring Type Joint

ANSI 150

WN Flange ANSI 150 FF (in)

WN Flange ANSI 150 RF (in)

WN Flange ANSI 150 RTJ (in)

ANSI 300

WN Flange ANSI 300 FF (in)

WN Flange ANSI 300 RF (in)

WN Flange ANSI 300 RTJ (in)

ANSI 400

WN Flange ANSI 400 FF (in)

WN Flange ANSI 400 RF (in)

WN Flange ANSI 400 RTJ (in)

ANSI 600

WN Flange ANSI 600 FF (in)

WN Flange ANSI 600 RF (in)

WN Flange ANSI 600 RTJ (in)

ANSI 900

WN Flange ANSI 900 FF (in)

WN Flange ANSI 900 RF (in)

WN Flange ANSI 900 RTJ (in)

ANSI 1500

WN Flange ANSI 1500 FF (in)

WN Flange ANSI 1500 RF (in)

WN Flange ANSI 1500 RTJ (in)

ANSI 2500

WN Flange ANSI 2500 FF (in)

WN Flange ANSI 2500 RF (in)

WN Flange ANSI 2500 RTJ (in)

The datasheets we have on this site are shown below. For simplicity sake, only datasheets that adhere to B16.5 are shown. ASME B16.5 covers flange dimensions from½”to 24”. For sizes larger than this, please visit our flange datasheets page.

Weld-Neck Tolerances

Dimensions

Class

Tolerances

inches

mm

D

Outside

Diameter*

D ≤ 610mm/OD ≤ 24″

± 0.06″

± 1.60mm

D > 610mm/OD > 24″

± 0.12″

± 3.20mm

j

Inside

Diameter

NPS ≤ 10″

± 0.03″

± 0.80mm

12″ ≤ NPS ≤ 18″

± 0.06″

± 1.60mm

NPS ≥ 20″

+ 0.12″, – 0.06″

+ 3.20mm, – 0.06mm

g

Diameter of

Contact Face

1.60mm (0.06″) Raised Face

± 0.03″

± 0.80mm

6.40mm (0.25″) Raised Face

± 0.02″

± 0.50mm

m

Outside Diameter

of Hub at base *

m ≤ 610mm (24″)

± 0.06″

+ 1.60mm

m > 610mm (24″)

± 0.12″

+ 3.20mm

a

Diameter of Hub

at point of Welding

NPS ≤ 5″

+ 0.09″, – 0.03″

+ 2.40mm, – 0.80mm

NPS ≥ 6″

+ 0.16″, – 0.03″

+ 4.00mm, – 0.80mm

k

Bolt Circle

Diameter

 

± 0.06″

± 1.60mm

 

Center to center of

adjacent bolt holes

 

± 0.03″

± 0.80mm

 

Eccentricity between

bolt circle diameter

and machined

facing diameters.

NPS ≤ 2 1/2″

± 0.03″

± 0.80mm

NPS ≥ 3″

± 0.06″

± 1.60mm

l

Drilling *

 

± 0.03″

± 0.80mm

h

Overall Length

through Hub

NPS ≤ 4″

± 0.06″

± 1.60mm

5″ ≤ NPS ≤ 10″

+ 0.06″, – 0.12″

+ 1.60mm, – 3.20mm

NPS ≥ 12″

+ 0.12″, – 0.18″

+ 3.20mm, – 4.80mm

b

Thickness

NPS ≤ 18″

+ 0.12″, – 0″

+ 3.20mm, – 0.0mm

NPS ≥ 20″

+ 0.19″, – 0″

+ 4.80mm, – 0.0mm

Equivalent Grades

STANDARD

WERKSTOFF NR.

UNS

JIS

BS

GOST

AFNOR

EN

SS 304

1.4301

S30400

SUS 304

304S31

08Х18Н10

Z7CN18‐09

X5CrNi18-10

SS 316

1.4401

S31600

SUS 316

316S31

-

Z7CND17‐11‐02

X5CrNiMo17-12-2

Chemical Composition

Grade

C

Mn

Si

P

S

Cr

Mo

Ni

N

SS 304

0.08 max

2 max

0.75 max

0.040 max

0.030 max

18 – 20

8 – 11

 

SS 316

0.08 max

2 max

0.75 max

0.045 max

0.030 max

16 – 18

2 – 3

10 – 14

0.1 max

Mechanical & Physical Properties

Density

Melting Point

Tensile Strength

Yield Strength (0.2%Offset)

Elongation

8.0 g/cm3

1400 °C (2550 °F)

Psi – 75000 , MPa – 515

Psi – 30000 , MPa – 205

35 %


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