Dimensions All dimensions are related to the reference temperature of 23 -/+ 2 C.

Nominal diameters The nominal diameter (DN) is related to the internal diameter (ID) regardless of the pressure rate. The hydraulic radius is the same for each nominal diameter.
DN/ID |
DN/OD range |
300 mm |
310 – 460 mm |
500 mm |
510 – 660 mm |
600 mm |
610 – 760 mm |
800 mm |
810 – 960 mm |
1000 mm |
1010 – 1160 mm |
1200 mm |
1210 – 1360 mm |
1400 mm |
1410 – 1560 mm |
1600 mm |
1610 – 1760 mm |
1800 mm |
1810 – 1960 mm |
2000 mm |
2010 – 2160 mm |
3000 mm |
3010 – 3160 mm |
Wall thickness The wall thickness (s) is half of the difference between the internal diameter and the external diameter.
Pipe marking Generally the pipes have to be marked according to DIN 8074 No.8. The minimum marking should indicate:
- Manufacturer Code, e.g. KRAH MISR
- If available, third-party control marks
- Material Code, e.g. PE100
- DIN-Number, e.g. DIN16961
- External diameter, e.g. DN/OD 1200 or internal diameter, e.g. DN/ID 1200
- Wall thickness, e.g. 30 mm
- Melt Flow Rate, e.g. MFR005
- Standard Dimension Ratio, e.g. SDR11
- Date of Manufacturing, e.g. 20030824
- Machine No., e.g. no. 7/KR600 The marking should be clear and should be placed outside of the pipe in radial direction, at least once per 1m pipe length.
Jointing For the jointing of the pipes the integrated electro fusion joint is recommended. or The Butt-Fusion technology according to DVS 2207. Also the flange connection, where the stub ends are integrated in the pipes, is applicable.
Quality control The quality control requirements and tests are according to DIN 8075, or other international standards.
Fittings All kinds of fittings can be manufactured out of pipe segments.
Certificate If agreed so, a test report shall be issued, giving the results of the routine tests carried out by the manufacturer.
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Tolerances for diameters |
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DN/ID <=700 mm |
+ 3.0 mm |
800 mm < DN/ID <=1000 mm |
+ 5.0 mm |
DN/ID > 1000 |
+ 6.0 mm |
DN/ID > 1600 |
+ 8.0 mm |
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