Careful attention is given to selecting the correct flange and gasket, whilst selection of the correct fasteners is often neglected. All elements of a flange assembly must be suitable if a leak free joint is to be obtained and maintained; bolts, studs, and nuts, are the fasteners that allow this to occur. This section deals with bolts, studs, screws, nuts, washers, bolting procedure, and their importance with relation to flanges.
Bolting Criteria Bolting criteria for a given flange is determined by the associated standard. For example, a flange of a certain size and class may have the following pre-defined factors:
Number of bolts required. Length of bolt required. Diameter of bolt required. Material of bolt required. Position of bolts on the flange blade. The number of bolts required will always be a multiple of 4 e.g. 4, 8, 12, 16 etc. As the size and class of a flange increases, so too does the number of bolts required and their diameter.
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SR3
1.4m x 1m Square Sheet of 3mm Thick EPDM Rubber
Stock Availability: In stock
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NAGS
1.5m x 1.5m Square Non Asbestos Sheet 1.6mm Thick
Stock Availability: In stock
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NAGS3
3mm Sheet of Non Asbestos Jointing Grade Y
Stock Availability: In stock
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M625
M6 x 25mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M630
M6 x 30mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1075
M10 x 75mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1250
M12 x 50mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1255
M12 x 55mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1260
M12 x 60mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1265
M12 x 65mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1270
M12 x 70mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1275
M12 x 75mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1290
M12 x 90mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M16100
M16 x 100mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M16110
M16 x 110mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1650
M16 x 50mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1655
M16 x 55mm High Tensile Bright Zinc Plated (BZP) Hex Head Bolt - Grade 8.8
Stock Availability: In stock
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M1660
M16 x 60mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1665
M16 x 65mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1670
M16 x 70mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1675
M16 x 75mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1680
M16 x 80mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M1690
M16 x 90mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M16120
M16 x 120mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock
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M16130
M16 x 130mm High Tensile Steel Bolt Grade 8.8, Bright Zinc Plated (BZP) Hexagon Head (part-threaded), used to fasten two or more components together.
Stock Availability: In stock