BS4504 Flanges Dimensions and Tolerances

BS 4504 Flanges Dimensions and Tolerances

DOWNLOAD BS 4504 FLANGES DIMENSIONS AND TOLERANCES PDF

  Dimension Range Tolerance
mm
Flange Facings Eccentricity of machined facing diameters < DN 100 1.0
> DN 100 2.0
a  (type B facing height) 2 mm +0, -1.0
3 mm +0, -2.0
4 mm +0, -3.0
5 mm +0, -4.0
6 mm +0, -5.0
b (type C and E facing height) All +0.5, -0
b (type G facing height) All +0, -0.5
b (type H facing height, outer) All +0.2, -0
c (type D and F facing height) All +0, -0.5
d (type H facing height, inner) All +0.5, -0
B and E (facing diameters) All +0, -0.5
C and D (facing diameters) All +0.5, -0
Surface Finish Facing types A, B, E and F All, turning Ra = 3.2 µm min 12.5 µm max
All, other than turning Ra = 3.2 µm min 6.3 µm max
Facing types C, D, G and H All Ra = 0.8 µm min 3.2 µm max
Flange Drilling Details B (diameter of bolt circle) Bolt sizes M10 to M24 ±0.9
Bolt sizes M27 to M45 ±1.4
Centre to centre of adjacent bolt holes Bolt sizes M10 to M24 ±0.45
Bolt sizes M27 to M45 ±0.7
All A (outside diameter) < DN 150 ±2.0
> DN 150 < DN 500 ±3.0
> DN 500 < DN 1200 ±5.0
> DN 1200 < DN 1800 ±7.0
> DN 1800 ±10.0
C (flange thickness, machined on both faces) < 18 mm thickness ±1.0
> 18 mm < 50 mm thickness ±1.0
> 50 mm thickness ±1.0
C (flange thickness, machined on front face) < 18 mm thickness +2.0, -1.0
> 18 mm < 50 mm thickness +4.0, -1.5
> 50 mm thickness +7.0, -2.0
Weld Neck Flanges, Code 111 B (outside diameter of hub at welding end) < DN 125 +3.0, -0
> DN 125 < DN 1200 +4.5, -0
> DN 1200 +6.0, -0
F (hub diameter) < DN 50 +0, -2.0
> DN 50 < DN 150 +0, -4.0
> DN 150 < DN 300 +0, -6.0
> DN 300 < DN 600 +0, -8.0
> DN 600 < DN 1200 +0, -10.0
D (length through hub) < DN 80 ±1.5
> DN 80 < DN 250 ±2.0
> DN 250 ±3.0
Slip on, Code 112 and Threaded,Code 113 E (slip on flange hub diameter)B (threaded flange hub diameter) < DN 50 +1.0, -0
> DN 50 < DN 150 +2.0, -0
> DN 150 < DN 300 +4.0, -.0
> DN 300 < DN 600 +8.0, -0
> DN 600 < DN 1200 +12.0, -0
> DN 1200 < DN 1800 +16.0, -0
> DN 1800 +20.0, -0
B (slip on bore diameter) < DN 100 +0.5, -0
> DN 100 < DN 400 +1.0, .0
> DN 400 < DN 600 +1.5, .0
> DN 600 +3.0, -0
D (length through hub) Same as Weld Neck D
Blank Flanges, Code 105 B (flange thickness) Same as C for all other flanges
C (unmachined centre portion) Maximum specified

BS4504 Flange Industries and Applications Widely used in the industries

  • Pumps, Valves, and vessels in manufacturing and food processing.
  • Pipe connections in industrial waterworks.
  • Heat exchangers and heating systems of all sizes.
  • Mining support.
  • Nuclear power systems.
  • Plumbing and mechanical systems.
  • Assemblies in the oil, gas, and petrochemical industries.
  • Fire protection systems.

BS4504 Flange Supply and Export Network List of Cities and Countries

Afghanistan Algeria Angola Argentina
Australia Austria Azerbaijan Bahrain
Bangladesh Belarus Belgium Bhutan
Bolivia Brazil Bulgaria Canada
Chile China Colombia Costa Rica
Croatia Czech Republic Aberdeen Abu Dhabi
Ahmedabad Ahvaz Al Jubail Al Khobar
Algiers Ankara Atyrau Bangkok
Bengaluru Bhopal Bogota Brisbane
Busan Cairo Calgary Caracas
Chandigarh Chennai Chiyoda Coimbatore
Colombo Courbevoie
Denmark Ecuador Egypt Estonia
Finland France Gabon Ghana
Greece Hong Kong Hungary India
Indonesia Iran Iraq Israel
Italy Japan Jordan Dallas
Dammam Doha Dubai Edmonton
Ernakulam Faridabad Geoje-si Gimhae-si
Granada Gurgaon Hanoi Haryana
Ho Chi Minh City Hong Kong Houston Howrah
Hyderabad Indore Istanbul Jakarta
Jeddah
Kazakhstan Kenya Kuwait Lebanon
Libya Lithuania Malaysia Mexico
Mongolia Morocco Netherlands New Zealand
Nigeria Norway Oman Pakistan
Peru Philippines Poland Portugal
Qatar Romania Russia Karachi
Kolkata Kuala Lumpur Kuwait City La Victoria
Lagos Lahore London Los Angeles
Ludhiana Madrid Manama Melbourne
Mexico City Milan Montreal Moscow
Mumbai Muscat Navi Mumbai New Delhi
New York Noida Perth Petaling Jaya
Pimpri-Chinchwad Port-of-Spain Pune Rajkot
Rio de Janeiro Riyadh
Saudi Arabia Serbia Singapore Slovakia
South Africa South Korea Spain Sri Lanka
Sweden Switzerland Taiwan Thailand
Trinidad & Tobago Tunisia Turkey Ukraine
United Arab Emirates (UAE) United Kingdom (UK) United States (US) Venezuela
Vietnam Yemen Santiago Secunderabad
Seoul Sharjah Singapore Surat
Sydney Tehran Thane Thiruvananthapuram
Toronto Ulsan Vadodara Visakhapatnam
Vung Tau
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