Ring Type Joint Blind

  • 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* Threaded Within limits on boring gauge
Slip-On, and Lap Joint 10″ and smaller +1/32″
12″ and smaller +1/16″
DIAMETER OF COUNTERBORE Same as for Inside Diameter
DIAMETER OF CONTACT FACE 1/16″ Raised Face ±1/32″
1/4″ Raised Face Tongue and Groove, or Male and Female ±1/64″
OUTSIDE DIAMETER OF HUB* 12″ and smaller +3/32″, -1/16″
14″ and larger ±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* 18″ and smaller +1/8″ -1/32″
20″ and larger +3/16″ -1/16″
THICKNESS 18″ and smaller + 1/8″ -0″
20″ and larger +3/16″ -0″
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