WELD SYMBOL DIMENSION TOLERANCE

A tolerance applicable to a weld may be shown as a dimension within the tail of the welding symbol, Figure 10.37.

SUMMARY

1. The terms arrow side, other side, and both sides refer to the location of the weld with relation to the-joint.

2. The elements that can be added to the basic weld symbols are: contour and finish desired; dimensions such as size, strength, length, pitch, angle of groove, angle of counter sink, root opening, and depth of preparation; combinations of different types of weld symbols; number of welds (quantity of resistance - spot and projection welds required); field weld and weld-all-around symbols; specification and process references; and detail references for special welds and test symbols.

3. By application of standard elements to the reference line and tail of the welding symbol, and by use of the arrow or multiple arrows to indicate the location of welds, the necessary information is provided to the welder for performance of required welds.

4. Multiple reference lines may be used to indicate the sequence of operations and supplementary data applicable to the weld symbols shown.

5. When the information shown by the welding symbol is not adequate, it is supplemented by written data, notes, and specifications, and by detail and section drawings.

There are standard abbreviations or letter designations for the various welding processes that are applied to the tail of the welding symbol when it is appropriate to do so.

Graph paper is provided at the end of this review for your use.

1. What is the purpose of a weld symbol? 7. Sketch and label the symbols used to indicate

the contour of a weld.

8. Apply a welding symbol to show a fillet weld to the following joints as indicated in a, b, and c.

2. Identify the arrow side and other side of the welding symbols shown.

a. Both sides b. Arrow side c. Other side

9. Describe the difference between a weld symbol and a welding symbol.

3. On which side of the reference lines are the following weld symbols located?

a.

'FT4''

10. What information is usually placed in the tail of the symbol?

4. Indicate the side of the joint to be welded by placing an X at the appropriate point(s) on the joint.

/ II

L....... L

11. Give two methods used to specify the size of a weld.

12. Give two reasons for using standard letter designations.

5. Describe the types of welds specified in question 4.

13. Where are letter designations principally found on a welding symbol?

a.

b.

a. _

d.

14. List four categories of welding letter designations.

6. Give the significance of the following symbols.

15. Do all letters found on a print represent abbreviations or letter designations? ___

Give a reason for your answer.

16. How is it possible to distinguish a welding

abbreviation or letter designation from another standard abbreviation?

17. Interpret the significance of the letters shown in the following illustrations (a through f).

_y" FW =______________________

b.

FW

A-A =

=■

G

“A”

FW

M

18. In question 17a, identify the kind of material represented by the section lines.

19. Explain the significance of each element shown in the following welding symbols a. and b.

(c--------------------------------------------

®--------------------------------------------

Q--------------------------------------------

Q--------------------------------------------

(k-------------------------------------------

(k-------------------------------------------

(M------------------------------------------

20. a. Explain the abbreviation “CJP.”

b. Where is it usually located on the welding symbol?

21. a. Explain the abbreviation “R” when used with a backing symbol.

b. Where is this abbreviation usually found on the welding symbol?

<8---------------------------------------------------------

d---------------------------------------------------------

(c----------------------------------------------------------

®----------------------------------------------------------

d---------------------------------------------------------

a-----------------------------------------------------------

(0----------------------------------------------------------

®----------------------------------------------------------

G----------------------------------------------------------

Q----------------------------------------------------------

a-----------------------------------------------------------

(k ---------------------------------------------------------

b. Should the other side weld be made first?

22. a. Which is the first weld to be made in the following welding symbol?

b. Which is the second weld to be made?

c. Explain the significance of the broken arrow line.

—[7--------- -<TYP

T---------------

23. Explain the significance of each element shown in the following welding symbols in a. and c.

G--------------------------------------------------

Q--------------------------------------------------

a---------------------------------------------------

cl-------------------------------------------------

24. Identify the dimensions shown on the following welding symbol:

26. Prepare a right oblique sketch which illustrates the significance of the following weld symbols.

27. a. I dentify the symbol that has replaced the

now obsolete corner flange and edge flange symbols.

(S.

(C.

b. Using a sketch, show an other side version of this symbol.

c. Can a both sides application of this weld symbol be used with a welding symbol?

25. Explain the significance of the following weld symbol.

ALL WELDS TO BE V-GROOVE WITH FULL PENETRATION

BEARING (LARGE)

BEARING (SMALL)

SHAFT 1/2" X 10-1/8" LONG - CRS

CABLE DRUM

ORDER NO. 101

MATL SEE DETAILS

SCALE 5/8” - 1" DRAWN BY: L. GRADY

DRAWING NO.

COMPANY NAME

DETAIL AND ASSEMBLY PRINTS FOR CABLE DRUM

EDITOR'S NOTE: REDUCED PRINT. FOLLOW STATED DIMENSIONS ONLY. NOT TO BE SCALED.

Refer to the drawing, Cable Drum, page 136.

1. Explain the significance of the different welding symbols found in the details for parts

(A, d, and <C.

<S--------------------------------------------------------------

®---------------------------------------------------------------

<g -------------------------------------------------------------

2. Explain the significance of the welding symbols found in the assembly print.

7. Determine the approximate total lengths of welds for parts , ,and.

<S-----------------------------------------------------------------------------

®-----------------------------------------------------------

<&----------------------------------------------------------

8. What is the total length of 11/2" pipe required for making the Cable Drum?

9. State whether line (in part ) represents a vertical or horizontal surface in the view shown in the lower part of the print.

Why has a tail been omitted on many of the

, , , r, , . _ 10. Name the views used to show parts (a and (R.

welding symbols found on these prints?

4. What is the inside diameter of the pipe for part (A? (Note: Refer to Appendix 3.)

<S--------------------------------------------------------------

5. What are the dimensions for the following distances in the detail prints?

11. Refer to the detail for part and answer the following questions.

a. What surface in the front view represents line (K?

b. What surface in the front view represents line?

12. With a simple sketch, show the significance of the note that indicates the size of the fillet welds for part ^ .

13. Give the approximate overall sizes for the support brackets used in fabricating parts (R and (C.

6. What is the overall length of the assembled unit?

14. What material is specified for part?

15. How is the shaft fastened to the large drum?

16. How many support brackets are required for the large bearing?

17. a. What weld is specified for fastening the end plates to the BI pipe?

NOTES:

1. Refer to Appendix 9 to answer 17b, or use the following formula:

Diameter of a circle X 3.1416 or 22/7 equals its circumference.

2. The constants 3.1416 and 22/7 are indicated by the Greek letter p or Pi.

Examples:

A diameter (f) of 2" X p equals a circumfer­ence of 6.2832 (decimal fraction).

A diameter of 4" X Pi equals a circumference of 12 4/7" (commonfraction).

b. How many inches of weld is required for each?

SCREW HOLES

THRU 6 HOLES

STOCK SIZES: SKIN ^ MS

HEADS MS STACK я MS

SPEC A

ALL LUGS TO BE WELDED

MAT. SEE MOTE DWG.. BY: L. GRADY

ORDER NO 86

DWG. NO: 3841

DETAIL В HOLD DOWN LUG 3 REQ’D

EQUALLY SPACED ON TANK

SCALE 1/8"= 1"

HOT WATER TANK

EDITOR'S NOTE: REDUCED PRINT. FOLLOW STATED DIMENSIONS ONLY. NOT TO BE SCALED.

FULL SIZE DRAWING IS PROVIDED AT THE BACK OF THE TEXT.

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