Design standard of bolts under wooden insulation blocks for cold heat exchangers and horizontal vessels. Use this standard for study purposes only.
| Type 1 | Type 2 | |
| Bolt diameter | 20 mm | 24 mm |
| Lt | 200 mm | 220 mm |
Material specification
Bolts and nuts: 4.6 DIN 267
Washer: ST 33 DIN 17100
Dimensional specification
Bolt: DIN 601 or NEN 102
Nuts: DIN 555 or NEN 697
Washer: DIN 126 or NEN 2268
Reference drawings
Wooden insulation blocks for cold heat exchangers BN-DS-J29
Woodene insulation blocks for cold horizontal vessels BN-DS-J30
The next figures show a typical design:
