445 

Pipeline and Haz. Matls. Safety Admin., DOT 

§ 172.532 

(b) In addition to meeting the re-

quirements of § 172.519 for minimum du-
rability and strength, the square back-
ground must consist of a white square 
measuring 14

1

⁄

4

inches (362.0 mm.) on 

each side surrounded by a black border 
extending to 15

1

⁄

4

inches (387.0 mm.) on 

each side. 

[Amdt. 172–29, 41 FR 15996, Apr. 15, 1976, as 
amended by Amdt. 172–64, 46 FR 5316, Jan. 19, 
1981; Amdt. 172–78, 48 FR 10226, Mar. 10, 1983] 

§ 172.528

NON-FLAMMABLE GAS 

placard. 

(a) Except for size and color, the 

NON-FLAMMABLE GAS placard must 
be as follows: 

(b) In addition to complying with 

§ 172.519, the background color on the 
NON-FLAMMABLE GAS placard must 
be green. The letters in both words 
must be at least 38 mm (1.5 inches) 

high. The symbol, text, class number 
and inner border must be white. 

[Amdt. 172–123, 56 FR 66261, Dec. 20, 1991] 

§ 172.530

OXYGEN placard. 

(a) Except for size and color, the OX-

YGEN placard must be as follows: 

(b) In addition to complying with 

§ 172.519 of this subpart, the background 
color on the OXYGEN placard must be 
yellow. The symbol, text, class number 
and inner border must be black. 

[Amdt. 172–123, 56 FR 66262, Dec. 20, 1991] 

§ 172.532

FLAMMABLE GAS placard. 

(a) Except for size and color, the 

FLAMMABLE GAS placard must be as 
follows: 

(b) In addition to complying with 

§ 172.519, the background color on the