Table 4 Damage criteria for different levels.

From: Theoretical analysis of the deformation for steel gas pipes taking into account shear effects under surface explosion loads

Damage level

Slight damage

Moderate damage

Severe damage

Collapse

Deflection-span ratio

 < 1/200

1/200–1/100

1/100–1/50

 > 1/50

Displacement/mm

 < 5

5–10

10–20

 > 20

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