455 

Pipeline and Haz. Matls. Safety Admin., DOT 

Pt. 172, App. B 

1 = Radius of Circle— 

Minimum dimensions 
4 mm (0.16 inch) for markings and labels 
12.5 mm (0.5 inch) for placards 

2 = 1

1

⁄

2

Radii 

3 = 5 radii for markings and labels 

4

1

⁄

2

radii for placards. 

[60 FR 50306, Sept. 28, 1995, as amended by 
Amdt. 172–143, 61 FR 20750, May 8, 1996] 

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