GB/T 36489-2018Flow chart of air separation plant—Graphical symbols and letter codes (English PDF)

Foreword

This standard was drafted in accordance with the rules given in GB/T 1.1-2009.

1 Scope

This standard specifies the graphical symbols and text codes of the air separation equipment flow chart.

This standard applies to the flow chart for drawing air separation equipment and the preparation of relevant technical documents. Draw other gas separations, liquefaction and extraction The flow chart of the equipment and the preparation of technical documents can be referred to.

2 Normative references

The following documents are indispensable for the application of this document. For dated references, only dated versions apply to this document. For undated references, the latest edition (including all amendments) applies to this document.

GB/T 4457.4 mechanical drawing pattern drawing line

GB/T 4458.4 mechanical drawing size note

GB/T 14691 technical drawing font

3 General regulations

3.1 The graphic symbols in this standard should be drawn with thick solid lines. The width b of the line should meet the requirements of GB/T 4457.4. With 0.5mm, it is allowed to use thin solid line for pipeline, pipe fittings, valves and measuring control components (the width of the line is about b/3, it is recommended) 0.18mm) drawing. On the same pattern, the various types of graph lines and widths of the graphic symbols should be consistent.

3.2 The word code shall comply with the provisions of GB/T 14691.

3.3 Graphic symbols allow for combination and position to allow rotation.

3.4 When drawing graphic symbols, you can zoom in or out according to the legend shown in this standard.

3.5 Graphical symbols not listed in this standard may be represented by one of the following methods.

a) visualize and simplify the representation of the shape, features and dimensions of the actual object;

b) by a long square (or square), indicating the name;

c) Add a graphic symbol.

3.6 The flow chart of the air separation equipment should be drawn according to the single or multi-body equipment, or it can be drawn according to the system. It is better to use the A2 frame.

4 Equipment, machine system graphical symbols

4.1 The tower is as specified in Table 1.