Ring Type Joint Weldneck

  • In accordance to ASME/ANSI B16.5, MSS SP-6 & 25
  • ASTM / ASME A/SA-182
  • The depth of groove is added to the minimum flange thickness
  • * Raised Face “L” is equal to groove dimension “E” but is not subject to tolerance for “E”
  • Sizes 1/2″ through 2-1/2″ are identical between Classes 900 and 1500

Additional Information

Use Custom Product to make a request for dimensions not shown.  

Pressure-Temperature Ratings (Class 900)

Metal Temperature F° Pressurea (Type 304/L & 316/L)
-20 à 100 1800
200 1520
300 1360
400 1240
500 1145
600 1080
650 1050
700 1030
750 1010
800 985
850 965b
900 –
950 –
1000 –

a  (Pounds per Square Inch Gage)

b Class 316/L

Dimensional Tolerances

OUTSIDE DIAMETER* When O.D. is 24” or less ±1/16”
When O.D. is over 24” ±1/8”
INSIDE DIAMETER* 10” and smaller ±1/32”
12” through 18” ±1/16”
20” and larger +1/8” -1/16”
DIAMETER OF CONTACT FACE 1/16” Raised Face ±1/32”
1/4” raised Face Tongue and Groove, or Male and Female ±1/64”
DIAMETER OF HUB AT POINT OF WELDING 5” and smaller +3/32”, -1/32”
6” and larger +5/32”, – 1/32”
WELDING BEVEL STANDARDS See drawings
DIAMETER OF HUB AT BASE* When Hub Base is 24” or less ±1/16”
When Hub Base is over 24” ±1/8”
DRILLING Bolt Circle ±1/16”
Bolt hole spacing ±1/32”
ECCENTRICITY BOLT CIRCLE & FACING (with respect to Bore*) 2 1/2” and smaller 1/32” max
3” and larger 1/16” max
LENGTH THRU HUB* 10” and smaller ±1/16”
12” and larger ±1/8”
THICKNESS 18” and smaller +1/8” -0”
20” and larger +3/16” -0”
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