CF Blank Flange
CF Blank Flange

CF Blanker,Fixed

CF flanges are available with tapped or untapped holes. Tapped flanges are available in UNC/UNF or metric threads. Tapped flanges have through holes, so bolts may protrude slightly from the back of the flange when fastened to an

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CF FLANGE SERIES

CF flanges are available with tapped or untapped holes. Tapped flanges are available in UNCUNf or metric threads. Tapped tlanges have through holes, so bolts may protrude slightly from the back of the flange when fastened to an untapped
flange. Untapped Cf flanges can be fastened to each other with stainless steel bolts and hex nuts or plate nuts. Plate nuts center themselves over two adjacent holes and can be held in place with one finger while the bolts are tightened. They are avallable for most flange sizes from 1 1/3 to 10 inch (33.96-254mm) ODs. As an alternative to hex head bolts, 12-point bolts are available for CF flanges from 2 3/4 to 10 inch (33.96 to 354mm) ODs. Silver plated bolts eliminate the need for anti-seize compoundin clean room environments.

 

ASSEMBLY INSTRUCTIONS FOR CF FLANGES

1. Apply a small amount of high temperature anti-seize compound to the bolt threads

2. Check that both flange surfaces are clean and sealing edges are free from nicks and scratches.

3. Using clean, lint free gloves, unpack gasket.

4. Place gasket in the knife edge counterbore of nonrotatable flange.

5.Align the mating hole pattern and leak test grooves.

6. Install the proper bolts and tighten hand tight. Check to see that the flange faces are parallel.

7. Tighten the bolts 1/4 to 1/2 turns using a star pattern until the flange faces are metal to metal.

8. Torque the fasteners to the listed value using the same pattern.

 

* U.S. manufacturers of CF flanges name them according to their outer diameter measured in inches i.e. a CF600 flange has an outer diameter of approximately 6 inches.

* European identification for these flanges is expressed in a variety of ways; the flange outer diameter is measured in millimeters or the flange inner diameter counterbore (the area machined to accept tubing for welding)is measured in. millimeters or the inner diameter of the largest through bore is measured in millimeters. Measurements are rounded to the nearest millimeter for naming purposes.

* U.S. and Metric CF flanges are compatible. The only difference in design is that metric flanges have a metric bolt thread machined into tapped bolt holes. QiMing can provide both metric tapped flanges on request.

U.S.Flange Size DIN Standard European Sizes Flange Outer Dia
Inch Millimeter
CF133 DN16 CF CF16 1.33" 33.8
CF212   CF25 2.12" 53.8
CF275 DN35 CF CF35 2.75" 70
CF275   CF40 2.75" 85.7
CF338   CF50 3.38" 114.3
CF450 DN63 CF CF63 4.5" 117.5
CF462   CF80 4.62" 152.4
CF600 DN100 CF CF100 6" 203.2
CF675   CF130 6.75" 254
CF800 DN150 CF CF160 8" 304
CF1000 DN200 CF CF200 10" 336.6
CF1200 DN250 CF CF250 12 355.6
CF1325   CF270 13.25" 419.1
CF1400 DN300 CF CF300 14" 355.6
CF1650 DN350 CF CF350 16.5" 419.1

Torque Specifications

* Material:SS304/SS316L

* Tapped and Through Holes

 

Thru Holes

Model for 304 Size A(Inch/mm) D(lnch/mm) Bolt Hole PCD(Inch/mm) PCD(Inch/mm) N.W./g
Dia No.
GBF01H1F164 CF16 1.33"/33.8 0.3"/7.6 0.172"/4.4mm 6 1.062"/26.97 6  
GBF01H1F254 CF25 2.12"/53.8 0.47"/11.9 0.265"/6.7mm 6 1.625"/41.28 6 180
GBF01H1F354 CF35 2.75"/70 0.5"/12.7 0.265"/6.7mm 6 2.312"/58.72 6 350
GBF01H1F504 CF50 3.38"/85.7 0.62"/15.75 0.332"/8.43mm 8 2.85"/72.39 6  
GBF01H1F634 CF63 4.5"/1 14.3 0.68"/17.4 0.332"/8.43mm 8 3.628"/92.15 6  
GBF01H1F804 CF80 4.62"/117.5 0.75"/19.1 0.332"/8.43mm 10 4.03"/1 02.4 6  
GBF01H1F1004 CF100 6"/152.4 0.78"/19.9 0.332"/8.43mm 16 5.128"/130.25 8  
GBF01H1F1604 CF160 8"/203.2 0.88"/22.3 0.332"/8.43mm 20 7.128"/181.05 8  
GBF01H1F2004 CF200 10"/254 0.97"/24.6 0.332"/8.43mm 24 9.128"/231.85 8  
GBF01H1F2504 CF250 12"/304 1.12"/28.45 0.332"/8.43mm 32 11.181"/283.97 10  
GBF01H1F2704 CF270 13.25"/336.6 1.12"/28.45 0.39"/9.9mm 30 12.06"/306.3 10  
GBF01H1F3004 CF300 14"/355.6 1.12"/28.45 0.39"/9.9mm 30 12.81"/325.4 16  
GBF01H1F3504 CF350 16.5"/419.1 1.12"/28.45 0.39"/9.9mm 36 15.31"/388.9 20  

 

Metric Thread

Model for 304 Size A(Inch/mm) D(Inch/mm) Metric Thread PCD(Inch/mm) N.W./g
Thread No.
GBFO1M1F164 CF16 1.33"/33.8 0.3"/7.6 M4 6 1.062"/26.97  
GBF01M1F254 CF25 2.12"/53.8 0.47"/11.9 M6 6 1.625"/41.28 180
GBF01M1F354 CF35 2.75"/70 0.5"/12.7 M6 6 2.312"/58.72 350
GBF01M1F504 CF50 3.38"/85.7 0.62"/15.75 M8 8 2.85"/72.39  
GBF01M1F634 CF63 4.5"/1 14.3 0.68"/17.4 M8 8 3.628"/92.15  
GBFO1M1F804 CF80 4.62"/117.5 0.75"/19.1 M8 10 4.03"/102.4  
GBF01M1F1004 CF100 6"/152.4 0.78"/19.9 M8 16 5.128"/130.25  
GBF01M1F1604 CF160 8"/203.2 0.88"/22.3 M8 20 7.128"/181.05  
GBF01M1F2004 CF200 10"/254 0.97"/24.6 M8 24 9.128"/231.85  
GBF01M1F2504 CF250 12"/304 1.12"/28.45 M8 32 11.181"/283.97  
GBF01M1F2704 CF270 13.25"/336.6 1.12"/28.45 M10 30 12.06"/306.3  
GBF01M1F3004 CF300 14"/355.6 1.12"/28.45 M10 30 12.81"/325.4  
GBF01M1F3504 CF350 16.5"/419.1 1.12"/28.45 M10 36 15.31"/388.9  

 

UNC Thread

Model for 304 Size A(Inch/mm) D(lnch/mm) UNC Thread PCD(Inch/mm) N.W./g
Thread No.
GBFO1T1F164 CF16 1.33"/33.8 0.3"/7.6 8-32 6 1.062"/26.97  
GBF01T1F254 CF25 2.12"/53.8 0.47"/11.9 1/4-28 6 1.625"/41.28 180
GBF01T1 F354 CF35 2.75"/70 0.5"/12.7 1/4-28 6 2.312"/58.72 350
GBF01T1F504 CF50 3.38"/85.7 0.62"/15.75 5/16-24 8 2.85"/72.39  
GBF01T1F634 CF63 4.5"/114.3 0.68"/17.4 5/16-24 8 3.628"/92.15  
GBF01T1F804 CF80 4.62"/117.5 0.75"/19.1 5/16-24 10 4.03"/102.4  
GBF01T1F1004 CF100 6"/152.4 0.78"/19.9 5/16-24 16 5.128"/130.25  
GBF01T1F1604 CF160 8"/203.2 0.88"/22.3 5/16-24 20 7.128"/181.05  
GBF01T1F2004 CF200 10"/254 0.97"/24.6 5/16-24 24 9.128"/231.85  
GBF01T1F2504 CF250 12"/304 1.12"/28.45 5/16-24 32 11.181"/283.97  
GBF01T1F2704 CF270 13.25"/336.6 1.12"/28.45 3/8-24 30 12.06"/306.3  
GBF01T1F3004 CF300 14"/355.6 1.12"/28.45 3/8-24 30 12.81"/325.4  
GBF01T1F3504 CF350 16.5"/419.1 1.12"/28.45 3/8-24 36 15.31"/388.9  
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