QUALITY ASSURANCE

AWWA Standard Flange


Dimensional tolerances

Ring type Slip-on and Blind flanges

HUB type slip-on

O.D.


<=24"

+/- 0.6"(1.6mm)

O.D.


<=24"

+/- 0.6"(1.6mm)

>24"

+/- .12"(3.2mm)

>24"

+/- .12"(3.2mm)

I.D.



Socket-Welding

10" and Samller
+.03"(0.8mm),-0"

I.D.



10" and Samller

+.03"(0.8mm)

Slip-on and 
Lap Joint


12" and Larger
+.06"(1.6mm),-0"


12"-18"

+/-.06"(1.6mm)

20"-42"

+.12"(3.2mm)
+.06"(1.6mm)

O.D. of Hub


<=12"

+.09"(2.4mm),
-.06"(1.6mm)

Diameter of
Contact Face


0.06" Raised Face


+/-.03"(0.8mm)


14"-42"

+/-.12"(3.2mm)

Diameter of Contact face


0.06" Raised Face


+/- .03"(0.8mm)


Diameter of Hub at base


X<=24"

+/-.06"(1.6mm)

X>24"

+/-.12"(3.2mm)

Deameter of Contact face


<=10"

+.03"(0.8mm),
-0"

Diameter of Hub at point of Welding


<=5"

+.09"(2.4mm),
-.03"(0.8mm)

12"-42"

+.06"(1.6mm),
-0"

>=6"

+.16"(4.0mm),
-.03"(0.8mm)

Drilling




Bolt Circle


1/2"-24"
/26"-42"

Drilling




Bolt Circle


1/2"-24"
/26"-42"

+/-.06"(1.6mm)
+/-.06"

+/-.06"(1.6mm)
+/-.06"

Bolt hole
spacing

+/-.03"(0.8mm)

Bolt hole
spacing

+/-.03"(0.8mm)

Eccentricity of Bolt circle with respect to bore

.03" Max.
(0.8mm)

Eccentricity of Bolt circle with respect to bore

.03" Max.
(0.8mm)

Thickness


18"& Small

+.12"(3.2mm),-0"

Thickness


18"& Small

+.12"(3.2mm),-0"

20"-42"

+.19"(1.6mm)

20"-42"

+.19"(1.6mm)

Length Thru Hub


<=10"

+/-.06"(1.6mm)

Length Thru Hub


<=10"

+/-.06"(1.6mm)

12"-42"

+/1.12"(3.2mm)

12"-42"

+/1.12"(3.2mm)


These tolerances are a part of ANSI B16.5 and AWWA C207-01 Sec. 4.2 except where noted otherwise.  The limits given are maximum.  Rigid inspection procedure assures the maintenance of high standards of accuracy in regular day to day production.


RELATED PRODUCTS

Providing professional one-stop procurement service for customers with excellent quality, competitive price, convenient transportation, and timely delivery.
  22nd Floor, Royal Wing Tower, Long Champ International Building, No.9 Xiangfu Road, Changsha, Hunan, China, PC:410116
  sales@threewaysteel.com
  0086-0731-8873-9521                                              0086-197-2011-0019

Products

Quick Links

Contact Us

About Us

Copyright © 2020 Threeway Steel Co.,Ltd. All rights reserved.