api 6a spec flange bolt ring chart tap end

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Diameter Length Diameter Length 2 1/16" R-23 RX-23 8 5/8" 3 3/4" 2 1/16" R-24 RX-24 8 7/8" 4 5/8" 2 9/16" R-26 RX-26 8 3/4" 4" 2 9/16" R-27 RX-27 8 1 5 1/8" 3 1/8" R-31 RX-31 8 3/4" 4 1/4" 3 1/8" R-31 RX-31 8 7/8" 4 5/8" 4 1/16" R-37 RX-37 8 7/8" 4 7/8" 4 1/16" R-37 RX-37 8 1 1/8" 5 1/2" 5 1/8" R-41 RX-41 8 1" 5 1/4" 5 1/8" R-41 RX-41 8 1 1/4" 6" 7 1/16" R-45 RX-45 12 1" 5" 7 1/16" R-45 RX-45 12 1 1/8" 5 7/8" 9" R-49 RX-49 12 1 1/8" 5 7/8" 9" R-49 RX-49 12 1 3/8" 6 3/4" 11" R-53 RX-53 16 1 1/4" 6 3/8" 11" R-53 RX-53 16 1 3/8" 7" 13 5/8" R-57 RX-57 20 1 1/4" 6 1/2" 13 5/8" R-57 RX-57 20 1 3/8" 7 3/8" 16 3/4" R-65 RX-65 20 1 1/2" 7 1/2" 16 3/4" R-66 RX-66 20 1 5/8" 8 3/8" 21 1/4" R-73 RX-73 24 1 5/8" 8 3/8" 20 3/4" R-74 RX-74 20 2" 10 1/8" 6BX 26 3/4" 20 1 3/4" 9 1/8" 6BX 26 3/4" 24 2" 11" Diameter Length Diameter Length 2 1/16" R-24 RX-24 8 7/8" 4 5/8" 1 13/16" 8 3/4" 3 3/4" 2 9/16" R-27 RX-27 8 1" 5 1/8" 2 1/16" 8 3/4" 3 7/8" 3 1/8" R-35 RX-35 8 1 1/8" 5 5/8" 2 9/16" 8 7/8" 4 3/8" 4 1/16" R-39 RX-39 8 1 1/4" 6 1/8" 3 1/16" 8 1" 5" 5 1/8" R-44 RX-44 8 1 1/2" 7 3/8" 4 1/16" 8 1 1/8" 5 3/4" 7 1/16" R-46 RX-46 12 1 3/8" 7 1/2" 5 1/8" 12 1 1/8" 6" 9" R-50 RX-50 12 1 5/8" 5 7/8" 7 1/16" 12 1 1/2" 7 3/4" 11" R-54 RX-54 12 1 7/8" 9 5/8" 9" 16 1 1/2" 8 1/2" 13 5/8" 16 1 5/8" 8 3/8" 11" 16 1 3/4" 9 3/4" 16 3/4" 16 1 7/8" 9 1/2" 13 5/8" 20 1 7/8" 11" 18 3/4" 20 2" 11 1/2" 16 3/4" 24 1 7/8" 11" 6BX 21 1/4" 24 2" 12" 18 3/4" 24 2 1/4" 14" 6BX 21 1/4" 24 2 1/2" 15 1/8" Diameter Length Diameter Length 1 13/16" 8 7/8" 4 1/8" 1 13/16" 8 1" 5 1/8" 2 1/16" 8 7/8" 4 3/8" 2 1/16" 8 1 1/8" 5 3/4" 2 9/16" 8 1" 4 7/8" 2 9/16" 8 1 1/4" 6 1/4" 3 1/16" 8 1 1/8" 5 1/2" 3 1/16" 8 1 3/8" 6 3/4" 4 1/16" 8 1 3/8" 6 1/2" 4 1/16" 8 1 3/4" 8 3/8" 5 1/8" 12 1 1/2" 7 5/8" 7 1/16" 16 2" 11 1/8" 7 1/16" 16 1 1/2" 8 3/8" 9" 16 2 1/2" 13 3/4" 9" 16 1 7/8" 10 1/8" 11" 16 2 3/4" 15" 11" 20 2" 12" 6BX 13 5/8" 20 3 18 1/8" 13 5/8" 20 2 1/4" 13 1/4" 6BX 18 3/4" 20 3" 16 3/4" API 6A Spec Flange Bolt & Ring Chart (Tap End & Pad Studs) BX-151 BX-152 BX-153 BX-154 BX-155 BX-169 BX-156 BX-157 BX-159 15000 lb 20000 lb BX-154 BX-157 BX-158 BX-158 BX-159 BX-153 BX-154 BX-155 BX-156 Number of Studs Stud Dimensions BX-151 BX-152 BX-154 API Pressure Rating Flange Size & Bore Ring Gasket Number of Studs Stud Dimensions API Pressure Rating Flange Size & Bore Ring Gasket BX-157 BX-164 BX-164 BX-168 BX-167 BX-165 10000 lb BX-151 BX-152 BX-153 5000 lb BX-160 BX-162 BX-163 BX-158 BX-159 BX-159 BX-155 BX-169 BX-156 API Pressure Rating Flange Size & Bore Ring Gasket Number of Studs Number of Studs Stud Dimensions Stud Dimensions Ring Gasket Number of Studs Stud Dimensions 3000 lb Flange Size & Bore API Pressure Rating Flange Size & Bore Ring Gasket Number of Studs Stud Dimensions API Pressure Rating 2000 lb API Pressure Rating Flange Size & Bore Ring Gasket

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API 6A Flange Chart

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  • Diameter Length Diameter Length

    2 1/16" R-23 RX-23 8 5/8" 3 3/4" 2 1/16" R-24 RX-24 8 7/8" 4 5/8"

    2 9/16" R-26 RX-26 8 3/4" 4" 2 9/16" R-27 RX-27 8 1 5 1/8"

    3 1/8" R-31 RX-31 8 3/4" 4 1/4" 3 1/8" R-31 RX-31 8 7/8" 4 5/8"

    4 1/16" R-37 RX-37 8 7/8" 4 7/8" 4 1/16" R-37 RX-37 8 1 1/8" 5 1/2"

    5 1/8" R-41 RX-41 8 1" 5 1/4" 5 1/8" R-41 RX-41 8 1 1/4" 6"

    7 1/16" R-45 RX-45 12 1" 5" 7 1/16" R-45 RX-45 12 1 1/8" 5 7/8"

    9" R-49 RX-49 12 1 1/8" 5 7/8" 9" R-49 RX-49 12 1 3/8" 6 3/4"

    11" R-53 RX-53 16 1 1/4" 6 3/8" 11" R-53 RX-53 16 1 3/8" 7"

    13 5/8" R-57 RX-57 20 1 1/4" 6 1/2" 13 5/8" R-57 RX-57 20 1 3/8" 7 3/8"

    16 3/4" R-65 RX-65 20 1 1/2" 7 1/2" 16 3/4" R-66 RX-66 20 1 5/8" 8 3/8"

    21 1/4" R-73 RX-73 24 1 5/8" 8 3/8" 20 3/4" R-74 RX-74 20 2" 10 1/8"

    6BX 26 3/4" 20 1 3/4" 9 1/8" 6BX 26 3/4" 24 2" 11"

    Diameter Length Diameter Length

    2 1/16" R-24 RX-24 8 7/8" 4 5/8" 1 13/16" 8 3/4" 3 3/4"

    2 9/16" R-27 RX-27 8 1" 5 1/8" 2 1/16" 8 3/4" 3 7/8"

    3 1/8" R-35 RX-35 8 1 1/8" 5 5/8" 2 9/16" 8 7/8" 4 3/8"

    4 1/16" R-39 RX-39 8 1 1/4" 6 1/8" 3 1/16" 8 1" 5"

    5 1/8" R-44 RX-44 8 1 1/2" 7 3/8" 4 1/16" 8 1 1/8" 5 3/4"

    7 1/16" R-46 RX-46 12 1 3/8" 7 1/2" 5 1/8" 12 1 1/8" 6"

    9" R-50 RX-50 12 1 5/8" 5 7/8" 7 1/16" 12 1 1/2" 7 3/4"

    11" R-54 RX-54 12 1 7/8" 9 5/8" 9" 16 1 1/2" 8 1/2"

    13 5/8" 16 1 5/8" 8 3/8" 11" 16 1 3/4" 9 3/4"

    16 3/4" 16 1 7/8" 9 1/2" 13 5/8" 20 1 7/8" 11"

    18 3/4" 20 2" 11 1/2" 16 3/4" 24 1 7/8" 11"

    6BX 21 1/4" 24 2" 12" 18 3/4" 24 2 1/4" 14"

    6BX 21 1/4" 24 2 1/2" 15 1/8"

    Diameter Length Diameter Length

    1 13/16" 8 7/8" 4 1/8" 1 13/16" 8 1" 5 1/8"

    2 1/16" 8 7/8" 4 3/8" 2 1/16" 8 1 1/8" 5 3/4"

    2 9/16" 8 1" 4 7/8" 2 9/16" 8 1 1/4" 6 1/4"

    3 1/16" 8 1 1/8" 5 1/2" 3 1/16" 8 1 3/8" 6 3/4"

    4 1/16" 8 1 3/8" 6 1/2" 4 1/16" 8 1 3/4" 8 3/8"

    5 1/8" 12 1 1/2" 7 5/8" 7 1/16" 16 2" 11 1/8"

    7 1/16" 16 1 1/2" 8 3/8" 9" 16 2 1/2" 13 3/4"

    9" 16 1 7/8" 10 1/8" 11" 16 2 3/4" 15"

    11" 20 2" 12" 6BX 13 5/8" 20 3 18 1/8"

    13 5/8" 20 2 1/4" 13 1/4"

    6BX 18 3/4" 20 3" 16 3/4"

    API 6A Spec Flange Bolt & Ring Chart (Tap End & Pad Studs)

    BX-151

    BX-152

    BX-153

    BX-154

    BX-155

    BX-169

    BX-156

    BX-157

    BX-159

    15000 lb

    20000 lb

    BX-154

    BX-157

    BX-158

    BX-158 BX-159

    BX-153

    BX-154

    BX-155

    BX-156

    Number

    of Studs

    Stud Dimensions

    BX-151

    BX-152

    BX-154

    API

    Pressure

    Rating

    Flange

    Size &

    Bore

    Ring GasketNumber

    of Studs

    Stud Dimensions API Pressure

    Rating

    Flange

    Size &

    Bore

    Ring Gasket

    BX-157

    BX-164

    BX-164

    BX-168BX-167

    BX-165

    10000 lb

    BX-151

    BX-152

    BX-153

    5000 lb

    BX-160

    BX-162

    BX-163

    BX-158

    BX-159

    BX-159

    BX-155

    BX-169

    BX-156

    API

    Pressure

    Rating

    Flange

    Size &

    Bore

    Ring GasketNumber

    of Studs

    Number

    of Studs

    Stud DimensionsStud Dimensions

    Ring GasketNumber

    of Studs

    Stud Dimensions

    3000 lb

    Flange

    Size &

    Bore

    API

    Pressure

    Rating

    Flange

    Size &

    Bore

    Ring Gasket

    Number

    of Studs

    Stud Dimensions API Pressure

    Rating

    2000 lb

    API

    Pressure

    Rating

    Flange

    Size &

    Bore

    Ring Gasket