CONTENTSPRIVATE

1. SCOPE

2. DEFINITIONS

2.1 Plan Drawing

2.2 Detail Drawing

3. FORMAT AND SCALE

4. DRAWING LAYOUT

4.1 Drafting Space

4.2 Title Block

4.3 Revision Column

4.4 Note Spaces

4.5 North Mark

4.6 Pipe Support List Column

5. INDICATION ITEMS AND FIGURATIONS

5.1 General

5.2 Pipe Supports

6. DIMENSIONAL INDICATION

6.1 Plan Drawing

6.2 Detail Drawing

7. SECTIONING AND ARRANGEMENT IN PIPING DRAWING

7.1 Plan Drawing

7.2 Drafting Arrangement of Detail Drawing

1.

SCOPE

(1)This standard practice covers the preparation of piping drawing in "Plan and Detailed Drafting Method".

(2)This standard practice shall be applied in conjunction with PI-DM-001 "Drafting Practice of Piping Drawing (General)".Where there is any discrepancy between this practice and the spec above, this practice shall govern.

2.

DEFINITIONS2.1

Plan Drawing

"Plan Drawing" used in this practice refers to a plan drawn of an area defined and enclosed by the match lines corresponding to those indicated on the "Key Plan Drawing". The Piping plan drawings of this type are called "Coordinate Type Drawings".

2.2

Detail Drawing

(1)"Detail Drawing" refers to a partially detailed drawing used for indicating in a readily understandable manner details of a complex piping configuration that cannot be expressed clearly on a "Plan Drawing".

(2)Generally, "Detail Drawing" utilizes the isometric drafting method. However, in the case where a sectional or a side view drawing or scaled-up plan drawing is more effective any one of those may be utilized.

(3)Method of isometric drafting shall principally be as shown in fig. 2. However, where there is a great possibility that such indication would cause more confusion by overlapping of piping, etc., the drawing may be indicated as shown in fig. 3 which is symmetrical to fig. 2.

3.

FORMAT AND SCALE

(1)Format for a plan and detail drawing shall be Job standard form (ISO Size A - 0)

(2)The scale for drafting of piping plan drawings shall be as follows :

Process Unit :

1/60, 1/30, 1/25 or 1:33-1/3

Offsite and utility Unit :1/30, 1/50, 1/60, 1/100, 1/200, 1/25 or 1:33-1/3

4.

DRAWING LAYOUT

(1)A plan and detail drawing shall be indicated on one sheet as shown below. However if this would result in over one sheet, an additional sheet may be used for detail drawings.

(2)Plan and detail drawing may have "Key Plan" indicated at the upper right corner of the drawing sheet.

Fig. 4 Drawing Layout

Note:

Indication shall conform to PI-DM-101

4.1

Drafting Space

A plan and each detail drawing for piping shall principally be drafted in these spaces especially, for plan drawing, match line for sectioned area defined by key plan shall be kept inside of this space, however, the dimensions, drawing numbers of connecting piping drawing, structural column numbers and coordinations may be shown outside of this space.

4.2

Title Block

(1)Name of drawing shall correspond to the specified drawing name in list.

(2)Job Code, Drawing Number, Unit Name, drawing Name and Name of Client shall be indicated as shown in fig. 5. These indications may be made by using stamps or templates.

(3)Date, Signature and Revision Number shall be indicated as shown in fig.5

Fig. 5 Example for Indication of Title Block

4.3

Revision Column

Indication of revisions shall be as shown in Fig. 5

4.4

Note Spaces

The Space shall be used for the following notes as required.

(1)Explanations of abbreviations, symbols, etc.

Example :(1)ELEVATIONS SHOWN ARE FROM BASE LINE TO CENTER OF PIPE UNLESS OTHERWISE NOTED

(2)BOP - BOTTOM OF PIPE

(2)Other specific requirements

4.5

North Mark

Indication of the north mark shall conform to PI-DM-001 and the mark shall be oriented toward left side or upward of the drawing sheet.

4.6

Pipe Support List Column

The pipe Support list shall be indicated in the upper right corner of the sheet as shown in Fig. 6.

Fig. 6 Example for Pipe Support List

PRIVATE *10 mm

PIPE SUPPORT LIST

10 mm

PS - No.SYMBOL OR DWG.No.REQ'D No.REMARKS

7.5 mm

PS -1PO4-A-2

3

2SEE DETAIL "E"

1

3P11-A-IR

6 2 SETS

PO4-AxC-11/2"-A3

2

4SP-10-30

2

20mm

67mm

15mm

30mm

4.6.1

PS-No. (Pipe Support No.)

The pipe support number shall be written in the "PS-No." column on each drawing starting from "PS-1" at the top and then proceeding down ward PS-2, PS-3, ... " consecutively. Where two or more supports are used in combination at one location only one common PS-No. shall be indicated. However, the drawing number (or support symbol) shall be indicated respectively.

4.6.2

DWG No. (or Support Symbol)

Pipe support symbols shall be indicated in accordance with the standard pipe supports shown in the JOB standard drawing.

However special type supports, shall be indicated with the drawing number of each pipe support drawing.

4.6.3

REQ'D No.

The Quantities of pipe supports shall be indicated for each PS-No. However, where two or more different type of pipe supports are to be used in combination, the total quantities of each type of pipe support shall be indicated in the "REQ'D No." columns.

4.6.4

Remarks

The required set number of the same PS-No. shall be indicated in the "REMARKS" columns.

5.

INDICATION ITEMS AND FIGURATIONS5.1

General

The indication items for plan and detail drawings shall be as shown in table 1. In addition, the method of indication shall conform to PI-DM-001 unless otherwise specified

Table 1 Indication Items in Plan and Detail Drawing (1/2)

PRIVATE Drawing

Item

Plan

Detail

Piping(1) Pipe

(2) Pipe Fitting

(3) Flange

(4) Valve (Incl. Control Valves) (1), (2)

(5) Special Piping Component

(6) Pipe Support (3)

(7) Piping Symbol (4) (1) Details which are unable to be expressed by plan drawing, to be indicated by the isometric, section or side view

Items in

Relation to

Piping (1) Full Line No.

(2) Direction of Fluid Flow

(3) Slope Piping

(4) Piping Class Break

(5) Symbol of Special Piping Part

(6) Extent of Personnel Protection (PP)

(7) Code Break -DITTO-

Process Equipment(1) Equipment (5), (6), (7), (8) (Incl. Skirt, Saddle, Leg, etc.)

(2) Nozzle (Incl. Manhole, Instrument Nozzle, etc.)

(3) Platforms and its elevation

(4) Ladder (Incl. cage) Stair

(5) Equipment name and item number(1) Details which are directly connected with piping but are difficult to be expressed by plan drawing, to be indicated

Structures and Building(1) Column (9)

(2) Beam

(3) Platform and Elevation

(4) Ladder (Incl. Cage), Stair

(5) Duct (Instrumentation, Electrical and Air Conditioning (10)(1) Details which are directly connected with piping but are difficult to be expressed by plan drawing, to be indicated

Instruments(1) Flow Instruments (12)

(2) Level Instruments

(3) Pressure Instrument (13)

(4) Temperature Instruments (14)

(5) Analyzer (13)

(6) Other Instruments installed in the piping systems

(7) Instrument tag number of above mentioned instruments - DITTO -

Others(1) Title

(2) Match Line and Connecting Piping DWG No.

(3) Revision No. and Description

(4) Notes

(5) North Mark

(6) Coordination of Match Line

(7) Pipe Support List

Notes

(1)The size of all valves shall be indicated.

(2)Size, rating, type of flange face shall be indicated on control valves and safety valves.

(3)Indication method shall be referred to para. 5.2. However, supports for vertical piping shall not be indicated in "plan drawing".

(4)Where materials not specified in the line class are to be used, symbol of the material shall be indicated.

(5)Outline figure of pump foundation shall be indicated instead of the pump figuration.

(6)In the case of large storage tanks, air - cooled heat exchangers, overall equipment figurations need not be indicated fully, the portion related with piping shall only be indicated, other portion may be omitted.

(7)Regarding the indication of equipment, where the indication method is not specified in PI-DM-001 the indication method shall conform to the other equipment indication method specified in the same spec. above.

(8)In case of furnaces, the stack and ducts shall be indicated as required.

(9)Where there are column numbers of structures, the numbers shall be indicated in the drawings.

(10)Ducts related with piping locally shall be indicated with only the outline.

(11)Example for indication of structure are shown in Fig.7.

(12)Pressure tubing for differential type flow meters shall be indicated in accordance with the rule established in the split of works of piping design department and instrumentation department.

(13)Pressure instrument and analyzers shall be as same as (12) above.

(14)Size of instrument shall be indicated in the drawing as shown below.

5.2

Pipe Supports

(1)Pipe supports shall be indicated with their figures and PS-Nes.

(2)The Support figure and PS-No. shall be indicated on plan drawings. Where indication on a plan drawing is impractical, they shall be indicated on detail drawings as shown in Fig. 8

(3)For each drawing, the PS-No. Shall be given consecutively starting from PS-1.

(4)Where many pipe supports of the same type such as pipe shoe etc. are used as shown in Fig. 9, indication of PS-No. shall be limited to only two or three supports. Indication of the PS-No. on the remaining supports may be omitted.

Fig. 7 Example for Indication of Platforms and Structures

Fig. 8Example for Indicating Pipe Support Figures and PS-Nos. on Detail Drawing

Fig. 9 Example for Omitting PS-Nos.

6.

DIMENSIONAL INDICATION6.1

Plan Drawing

The dimensions on plan drawings shall be indicated in accordance with PI-DM-001 without repeating. The item (1) to (17) indicated in Fig. 10,11,12 shall mean as follows

(1)Locational dimensions of equipment and structures, locational dimensions and coordinations of match line and battery limit line.

(2)Dimensions of horizontal straight piping (including those to match line or battery limit) shall principally be indicated per each piping at adequate nearest position. However, dimensions capable of easy understanding by other dimensions may be omitted.

(3)Matching dimensions with other drawing shall be indicated, and those of basis such as column center shall be sequentially indicated.

(4)Datum point for dimensions of piping location shall be indicated.

(5)Dimension of spacing between parallel run pipings shall be indicated based on the datum point or matching dimension of piping location.

(6)Dimensions of straight piping shall be sectioned at branch connection.

(7)Dimensions indicating branch location using O-let, half coupling, weld branch connection shall be indicated. However where the locations of drain, vent, pressure gage, temperature instrument, etc. are easily understandable, these dimensions may be omitted.

(8)Dimensions indicating the location of valves and instruments in a piping system shall be indicated. However, where these dimensions (such as bypass valves for control valves) are easily understandable, they may be omitted.

(9)Dimension indicating location of pipe support such as pipe stanchion etc. shall principally be indicated separately from the dimension of piping length, the indication of support location shall be based on the support centerline.

(10)Dimensions from flange face to equipment centerline (including gasket thickness as tightened) and the location of each equipment nozzle shall not be indicated, except rotary machines.

(11)Plan dimensions of platform shall not be indicated.

(12)Where there are piping which are connected to run piping on pipe rack at two or more different elevations, piping at the same elevation (including those piping which run at the slightly different elevations due to each shoe height) shall be grouped and the dimensions of piping locations shall be indicated.

(13)Piping laid out at an angle of 30( or 45( shall be indicated for length of piping with other two composed sides length of a triangle simultaneously.

(14)Where a piping connects to towers and drums at an angle of 30( or 45(, the piping dimensions shall be indicated with these angles.

(15)Where piping around plural number pumps are same figuration, the dimension for one pump only shall be indicated.

(16)The datum dimensions in a plan drawing for piping around vertical vessels by sectioning the height shall not be duplicated.

(17)Extent of applying dimension for personnel protection insulation shall be indicated.

6.1.2

Elevations

Elevations shall be indicated in accordance with PI-DM-001 without repeating. The symbols (a) ~ (e) indicated in Fig. 10, 11, 12 shall mean as follows:

(a)Piping elevation shall be indicated.

However, the elevations indicated in detail drawings shall not be indicated repeatedly in plan drawings.

(b)The elevation of vertical nozzles on equipment shall be indicated with NEL . However, the elevations indicated in detail drawings shall not be indicated repeatedly in plan drawings.

Note : NEL: An abbreviation stands for "Nozzle Elevation".

NEL is used to indicate the elevation of vertical nozzles on equipment and is expressed by the elevation of the flange face on the piping side.

(c)Where piping around plural number pumps are same figuration, the dimension for one pump only shall be indicated.

(d)The elevation of platforms shall be indicated.

(e)Floor elevation in a plan drawing shall be indicated.

Fig. 11 Example for Indication of Plan Drawing

Fig. 10 Example for Indication of Plan Drawing

Fig. 12 Example for Indication of Plan Drawing

6.2

Detail Drawing

The Dimensions on detail drawings shall be indicated in accordance PI-DM-001 without repeating as shown in Fig. 13

(1)Detail drawings shall show dimensions or elevations that cannot be indicated on plan drawings.

(2)Locations of valves or instruments installed on vertical piping shall be indicated on detail drawings.

Fig. 13 Example for Indication of detail Drawing

Detail " B " ( H 5 )7.

SECTIONING AND ARRANGEMENT IN PIPING DRAWING7.1

Plan Drawing7.1.1

Multi - layout of equipment in structures (including complicated equipments such as furnace, and boilers)

(1)Sectioning of Drawing

Drawings shall be sectioned per floor elevation of structure as shown in Fig. 14.

Fig. 14 Example for Sectioning of Multi - Floor Layout

(2)Drafting Arrangement

(a)Sectioned plan drawings shall be arranged in order from bottom to top plan, from left to right indicating their elevations as shown in Fig. 15.

(b)Where a sectioned plan drawing is arranged on individual drawing, the elevation of match line (ML) and reference drawing number (DWG No.) shall be indicated.

(c)In addition, the reference drawing number shall be indicated in notes space of the sheet.

Fig. 15 Arrangement of Multi-Floor Layout Drawing

Detail Drawing (see para. 7.2)7.1.2

Tower or Vertical Drum

(1)Sectioning of Drawing

Generally, towers and vertical drums have several platforms, man holes, piping and instrument in a overlap so that the indication is very difficult in one plan. In this case, the indication shall be made on a plan sectioned at the platform floor as shown in Fig. 16

Fig. 16Example for Sectioning of Drawing for tower or vertical Drum

(2)Drafting Arrangement

Sectioned plan drawings shall be arranged in order from bottom to top plan, from left to right indicating their elevations. However, where the arrangement can not be made in one row, the arrangement shall be made as U - arrangement as shown in Fig. 17, 18. Provided that no other problem is involved.

Fig. 17Example for U-Arrangement of Tower or Vertical Drum Section Plan

Fig. 18 Example for Arrangement of Drawing for Tower or Vertical Drum

7.1.3

Pipe Rack

(1)Sectioning of Drawing

Sectioning of pipe rack piping shall conform to Fig. 19. 20. (for reference). The items (a) ~ (e) indicated in Fig. 19, 20 shall mean as follows.

(a)Sectioning of drawing for pipe rack and equipment outside pipe rack as per "key plan for piping drawing"

(b)Sectioning of drawing for pipe rack and equipment under the pipe rack shall be made at a joint of pipe fitting (elbow, tee and O - let etc.) in run pipe on the lower pipe rack.

(c)Sectioning of drawing for upper and lower pipe rack shall be made at a joint of pipe fitting (elbow, tee and O - lets, etc.) in run pipe on the upper pipe rack.

(d)Sectioning of drawing for pipe rack and equipment on the structure on pipe rack shall be made at the floor elevation of equipment structure.

(e)Section of drawing for equipment under the pipe rack (such as pumps, etc.) and equipment outside pipe rack as per "key plan for Piping drawing"

Fig. 19 Example for Sectioning of Pipe Rack Piping Drawing

Mark :For Reference (As per "Key Plan For Piping Drawing)

Fig. 20 Example for Sectioning of Pipe Rack Piping Drawing

Mark : For Reference (As per "Key Plan For Piping Drawing)

7.1.4

Drafting Arrangement

(1)Where upper and lower run piping on pipe rack are indicated in one drawing, the upper piping shall be drafted on upper side, and the lower piping shall be on lower side in the drawing as shown in Fig. 21.

Fig. 21 Arrangement of Pipe Rack Piping Drawing

Detailed Drawing (see para. 7.2)

2.For run piping on long one row pipe rack, the piping drawing shall be drafted as shown in Fig. 22.

Fig. 22Drawing Arrangement of Horizontally Long One Row Pipe Rack

Fig. 23 Drawing Arrangement of Vertically Long One Row Pipe Rack

(3)Match line

Where the upper or lower run piping on pipe rack is sectioned on individual drawing, the unit number and sequential number of DWG No. shall be indicated as Fig. 24 and they shall be indicated in note spaces on the sheet by tabulation.

Fig. 24 Example for Indication of match Line DWG No.

DWG No. D - 10 - 1362 - 112 J - B

Example for indication of Omitted Drawing No. 10-012-A

7.2

Drafting Arrangement of Detail Drawing

(1)The detail drawings shall be drafted in the order of the designated individual detail drawing in the spaces after completion of plan drawing.

(2)Where the proper angle indication is to make confusion by the piping direction, the indication of the view angle may change as Fig. 25.

Fig. 25 Example for Changed Angle Indication

(3)For detail drawings, a grid system referenced shall be indicated in the sheet as shown in Fig. 26 In the case where a drawing sheet of "X" size is used, a grid shall also be indicated in the same manner.

Fig. 26 Example for Indication of Grid

Fig. 27 Example of Piping Drawing Prepared by Plan & Detail Drawing Method