BS 4504 Standard Flanges Type code,PN range and Marking Requirements
PDF:BS 4504 Standard Flanges Type code PN range Marking Requirements
BS 4504 Standard Flanges Type code,PN range and Marking Requirements.
Summary of flanges covered by BS 4504 : Section 3.1.
|
Code No. |
Description |
PN Range |
DN Range |
|
101 |
Plate flange for welding(see page 8-65) |
PN 2.5 |
DN 10 to DN 2000 |
|
PN 6, 10, 16, 25, 40 |
DN 10 to DN 600 |
||
|
102 |
Loose plate flange with weld-on plate collar or for lapped pipe end (Weld-on plate collar = Code 1321 Lapped pipe end = Code 1331) |
PN 6, 10, 16, 25, 40 |
DN 10 to DN 600 |
|
104 |
Loose plate flange with weld-neck collar (Weldneck collar = Code 1341) |
PN 6, 10, 16, 25, 40 |
DN 10 to DN 600 |
|
PN 2.5, 6 |
DN 10 to DN 2000 |
||
|
105 |
Blank flange (see page 8-70) |
PN 10, 16 |
DN 10 to DN 1200 |
|
PN 25, 40 |
DN 10 to DN 600 |
||
|
PN 2.5, 6, 10, 16 |
DN 10 to DN 20002 |
||
|
111 |
Weld-neck flange (see page 8-66) |
PN 25 |
DN 10 to DN 1000 |
|
PN 40 |
DN 10 to DN 600 |
||
|
112 |
Hubbed slip-on flange for welding(see page 8-68) |
PN 6 |
DN 10 to DN 300 |
|
PN 10, 16, 25, 40 |
DN 10 to DN 600 |
||
|
113 |
Hubbed threaded flange (see page 8-69) |
PN 6, 10, 16, 25, 40 |
DN 10 to DN 150 |
|
121 |
Integral flange |
PN 6, 10, 16, 25 |
DN 10 to DN 2000 |
|
PN 40 |
DN 10 to DN 600 |
Note:
-Flanges > DN 2000, are not covered in this summary.
-Dimensions: Nominal sizes, DN followed by a numerical designation of size (a convenient round number for reference purposes), are used as defined in ISO 6708.
-Pressure Ratings: Nominal pressures, i.e. PN followed by a numerical designation of size (a convenient round number for reference purposes), are used as defined in ISO 7268.
1 Dimensions for these flanges are not covered in this summary.
2 The DN range for weld neck flanges extends to DN 4000 for PN 2.5, to DN 3600 for PN 6, and to DN 3000 for PN 10.
Designations/Marking
Marking. All flanges are marked with BS number, code number,PN,DN,material designation,manufacturers name or trade mark,cast number or melt identification,thread identification,An example follows:
BS 4504/111/B – PN 16 -DN 400 -B4 – XXX – 12345.
BS-4504-FLANGE-MARKING-REQUIREMENT
Cast Number or melt identification Manufacturer’s name or trade mark Material designation Nominal size, DN
Nominal Pressure, PN Flange face type (A – H) Flange code number British standard number