What are the rules for color identification of chemical pipelines?

Numbering Media Name Coloring Pipeline Annotation Annotation Color

1 Industrial water is green and white.

Well water is green and well water is white.

3 Life Water Green Life Water White

4 filtered water green filtered water white

5. The circulating water is green and the circulating water is white.

6 circulating water green circulating water white

7 softened water green softened water white

8 Still water, green water, pure water and white water

9 Hot circulating backwater (top) dark red hot water (top) white

10 hot circulating backwater dark red hot water (back) white

1 1 Fire Water Green Fire Water Red

12 fire fighting foam red fire fighting foam white

13 frozen water (1) light green frozen water red

14 frozen backwater is light green, and frozen backwater is red.

15 frozen brine (top) light green frozen brine (top) red

16 frozen brine (back) light green frozen brine (back) red

17 low pressure steam red low pressure steam white

18 medium pressure steam red sub-steam white

19 high pressure steam red high pressure steam white

20 superheated steam crimson superheated steam white

2 1 steam backwater condensate dark red steam condensate (back) green

The steam condensate of waste gas is dark red, and the steam condensate (waste) is black.

23 air (compressed air) dark blue compressed air white

24 instrument air dark blue instrument air white

25 oxygen sky blue oxygen black

26 hydrogen dark green hydrogen red

27 nitrogen (low pressure gas) yellow low pressure nitrogen black

28 nitrogen (high pressure gas) yellow high pressure nitrogen black

29 nitrogen yellow for instrument and nitrogen black for instrument

Nitrogen dioxide black nitrogen dioxide yellow

3 1 vacuum white vacuum sky blue

32 ammonia yellow ammonia black

33 liquid ammonia yellow liquid ammonia black

34 ammonia yellow ammonia green

35 Chlorgrass Green Chlorine White

36 liquid ammonia grass green pure chlorine white

37 soda ash pink soda ash white

38 caustic soda dark blue caustic soda white

39 saline-alkali grayish yellow hydrochloride

40 sulfate red sulfate white

4 1 nitrate tube natural color nitrate blue

42 Acetic acid tube natural color acetic acid green

43 combustible gas such as gas purple gas (combustible gas) white.

44 flammable liquid silvery white oil (flammable liquid) black

45 The material pipeline is red, and the text is yellow according to the pipeline medium.