GB/T 50837-2013Standard for Non-ferrous Metal Refinery Drawings (English PDF)

2.1 Requirement of drawing

2.1.1 On the premise of meeting the content and depth requirements of each consulting and design stage, drawings shall be concise, clear and easy to understand.

2.1.2 The simplified Chinese characters, units of measurement, names and symbols used in engineering consulting and design drawings shall comply with the current relevant national laws, regulations and provisions.

2.1.3 Drawings shall adopt appropriate drawing sizes and scales according to the different consulting and design stages; the layout of the drawing shall be reasonable, the design contents expressed on the drawing shall be complete and concise, the graphic projections shall be correct, and the figures and text in the drawing shall be accurate.

2.2 Drawing size and boundary format

2.2.1 Drawing sizes shall comply with Table 2.2.1.

Table 2.2.1 Basic drawing sizes (mm) - size codes A0, A1, A2, A3 and A4, dimensions B x L.

2.2.2 Where necessary, drawing sizes (Figure 2.2.2) may be selected in accordance with Table 2.2.2.

Figure 2.2.2 Drawing sizes. Solid line - basic size; dashed line - elongated size.

Table 2.2.2 Elongated sizes (mm) - size codes A0x2, A0x3, A1x3, A1x4, A2x3, A2x4, A2x5, A3x3, A3x4 and A3x5.

2.2.3 The frame format (Figure 2.2.3-1, Figure 2.2.3-2, Figure 2.2.3-3) shall be the format with a binding margin. Drawing sizes and frame dimensions shall comply with Table 2.2.3.

Figure 2.2.3-1 Landscape format of A0, A1, A2 and A3 drawings

Figure 2.2.3-2 Portrait format of A4 drawings

Figure 2.2.3-3 Portrait format of A0, A1 and A2 drawings

Table 2.2.3 Drawing sizes and frame dimensions (mm)

2.3 Drawing title bar

2.3.1 Drawings shall be provided with a title bar, the contents of which shall include the project name, drawing title, design stage, design date, revision, designer and reviewers at all levels, etc. The title bar should be located at the lower right corner of the drawing. For A4 drawings it should be located at the lower edge of the drawing, and may also be located at the upper edge.

2.3.2 The title bar of design drawings for overseas projects shall be annotated in the foreign language; for design drawings of domestic projects, annotation in a foreign language may be omitted where there is no special requirement.

2.3.3 The title bar of as-built drawings shall comply with the following provisions:

1 Where the as-built drawing is inconsistent with the original construction drawing and is to be redrawn, "as-built drawing" shall be entered in the design stage field of the title bar format.

2 Where the as-built drawing is completely consistent with the original construction drawing, an as-built drawing stamp may be affixed to the left of the title bar of the original construction drawing; the stamp shall be marked "As-built drawing", and its contents shall include the construction organization, project name, compiler, reviewer, technical director, compilation date, supervision organization, site supervisor and chief supervisor.

2.3.4 When a whole set or part of existing drawings is reused, the appraiser shall affix a reused drawing stamp to the left of the title bar of the original drawing; the stamp shall be marked "Reused drawing", and its contents shall include the appraiser, reviewer, project name, project number, compilation time, etc.

2.3.5 Where the contents of a drawing need to be jointly confirmed by several disciplines, a joint approval column shall be provided at the upper left corner outside the inner frame of the drawing and marked "Joint approval column"; its contents shall include discipline, signature, date, etc. (Figure 2.3.5-1).

Figure 2.3.5-1 Format of joint approval column

2.4 Scale

2.4.1 Drawings shall be drawn to scale. Where a drawing cannot be drawn to scale, this shall be explained.

2.4.2 An appropriate scale shall be selected for drawing. Drawing scales should be selected from the series 1:(1, 2, 5) x 10^n; in special cases they may be selected from the series 1:(1.5, 2.5, 3, 4, 6) x 10^n.

2.4.3 The method of indicating the scale and its position shall comply with the following provisions:

1 Scales shall be expressed in Arabic numerals.

2 The drawing scale should be marked in the title bar; where a drawing contains several scales, the other scales shall be written below the corresponding view names (Figure 2.4.3).

Figure 2.4.3 Marking of view scales

2.4.4 Common scales for non-ferrous metal smelting engineering drawings may be selected in accordance with Table 2.4.4.

Table 2.4.4 Common scales for non-ferrous metal smelting engineering drawings:

- General layout plan: 1:2000, 1:1000, 1:500

- Layout drawing: 1:200, 1:100, 1:50

- Piping layout drawing: 1:500, 1:200, 1:100, 1:50, 1:25

- Installation drawing: 1:100, 1:50, 1:20, 1:10, 1:5

- Component and detail drawing: 1:20, 1:10, 1:5, 1:2, 1:1, 2:1

- Piping isometric drawing: may be drawn not to scale