Such a table will save untold time figuring the number of the smaller fittings in a pound of the various classes, or the number of pounds in a fitting of the larger sizes. The card can easily be ruled by the bookkeeper on a large bristol-board card, and the prices per piece rilled in, a place being left at the bottom for the discount and date of last quotation.

Table XI. Dimensions And Weights Of Double Extra Strong Wrought Pipe

Diameter

Thickness

Nearest Wire Gauge

Circumference

Transverse Areas

Length of Pipe Per Sq. Foot of

Nominal Weight per Foot

Nominal Internal

Actual External

Approximate Internal Diameter

External

Internal

External

Internal

Metal

External Surface

Internal Surface

Ins.

Inches

Inches

Inches

No.

Inches

Inches

Sq. Ins.

Sq. Ins.

Sq. Ins.

Feet

Feet

Pounds

1/2

.84

.244

.298

1

2.639

.766

.554

.047

.507

4.547

15.667

1.7

3/4

1.05

.422

.314

1

3.299

1.326

.866

.139

.727

3.637

9.049

2.44

1

1.315

.587

.364

00

4.131

1.844

1.358

.271

1.087

2.904

6.508

3.65

1 1/4

1.66

.885

.388

00

5.215

2.78

2.164

.615

1.549

2.304

4.317

5.2

1 1/2

1.9

1.088

.406

000

5.969

3.418

2.835

.93

1.905

2.01

3.511

6.4

2

2.375

1.491

.442

0000

7.461

4.684

4.43

1.744

2.686

1.608

2.561

9.02

2 1/2

2.875

1.755

.560

9/16 -

9.032

5.513

6.492

2.419

4.073

1.328

2.176

13.68

3

3.5

2.284

.608

5/8 -

10.996

7.175

9.621

4.097

5.524

1.091

1.672

18.56

3 1/2

4.

2.716

.642

5/8 x

12.566

8.533

12.566

5.794

6.772

.955

1.406

22.75

4

4.5

3.136

.682

11/16

14.137

9.852

15.904

7.724

8.18

.849

1.217

27.48

4 1/2

5.000

3.564

.718

3/4

15.708

11.197

19.635

9.976

9.659

.764

1.000

32.53

5

5.563

4.063

.75

3/4

17.477

12.764

24.306

12.965

11.34

.687

.940

38.12

6

6.625

4.875

.875

7/8

20.813

15.315

34.472

18.666

15.806

.577

.784

53.11

Double extra strong pipe is always shipped without threads or couplings unless otherwise specified.

In like manner the list price on galvanized malleable fittings is shown in Table VIII. This table may be ruled on a separate sheet of bristol board, or placed on the back side of the price list for black malleable fittings.

In order that the estimator may compute the cost of freight and drayage, he must be able to reduce the number of feet of wrought pipe to pounds. This he can readily do by means of tables IX., X. and XI.