Din 8570 B Pdf _top_ -

is an older German technical standard that specifies general tolerances for welded structures

| Imperfection | Quality Level B Limit | |--------------|------------------------| | Longitudinal crack | Not permitted | | Transverse crack | Not permitted | | Porosity (single pore) | Max. 0.3 mm diameter | | Porosity (cluster) | Max. 2% of weld area | | Undercut | Depth ≤ 0.5 mm | | Excess weld metal (reinforcement) | ≤ 1 mm + 0.1 x weld width | | Incomplete penetration | Not permitted (except by design) | | Concavity (root side) | ≤ 0.5 mm | | Linear misalignment | ≤ 0.2 x plate thickness, max. 2 mm |

4. Legacy extracts (not the full PDF)

Some training centers and universities offer comparison tables between DIN 8570 B and ISO 5817 Level B. These are useful for reference but not for official compliance. din 8570 b pdf

When a drawing says “DIN 8570-B2”, it means: All weld imperfections must conform to the medium quality level as per part B of the standard.

ISO 13920 Welding General tolerances for welded constructions is an older German technical standard that specifies

D. Material/specification requirements

Here’s what you must do:

The designation "B" in DIN 8570-B specifies a particular accuracy class for linear and angular dimensions. Most welded structures do not require the high precision of machined parts, so DIN 8570 defines four classes based on "customary workshop accuracy": Class A: Fine (high accuracy).