Table 10.  SUGGESTED PIPE SIZE FOR MULTIPLE GAS APPLIANCES (NATURAL GAS)

Nominal

 

 

 

Maximum Capacity of Pipe in BTU/hr and kW for Gas Pressures of 14 in. W.C. (0.5 psi) or Less and

 

 

Iron Pipe

 

 

 

a Pressure Drop of 0.5 in. W.C. (based on 0.60 Specific Gravity Gas w/Heating Value of 1,000 BTU’s/Ft3)

 

 

Size

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Length of Pipe in Feet (Meters)

 

 

 

 

 

(Inches)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10 (3.05)

20 (6.1)

30 (9.14)

40 (12.19)

50 (15.24)

60 (18.29)

70 (21.34)

80 (24.38)

90 (27.43)

100 (30.48)

125 (38.1)

150

175

200

1 1/2

BTU/hr

2,100,000

1,460,000

1,180,000

990,000

900,000

810,000

750,000

690,000

650,000

620,000

550,000

500,000

460,000

 

kW

615

428

346

290

264

237

220

202

190

182

161

146

135

2

BTU/hr

3,950,000

2,750,000

2,200,000

1,900,000

1,680,000

1,520,000

1,400,000

1,300,000

1,220,000

1,150,000

1,020,000

950,000

850,000

800,000

 

kW

1,157

805

644

556

492

445

410

381

357

337

299

278

249

234

2 1/2

BTU/hr

6,300,000

4,350,000

3,520,000

3,000,000

2,650,000

2,400,000

2,250,000

2,050,000

1,950,000

1,850,000

1,650,000

1,500,000

1,370,000

1,280,000

 

kW

1,845

1,274

1,031

879

776

703

659

600

571

542

483

439

401

375

3

BTU/hr

11,000,000

7,700,000

6,250,000

5,300,000

4,750,000

4,300,000

3,900,000

3,700,000

3,450,000

3,250,000

2,950,000

2,650,000

2,450,000

2,280,000

 

kW

3,222

2,255

1,830

1,552

1,391

1,259

1,142

1,084

1,010

952

864

776

718

668

4

BTU/hr

23,000,000

15,800,000

12,800,000

10,900,000

9,700,000

8,800,000

8,100,000

7,500,000

7,200,000

6,700,000

6,000,000

5,500,000

5,000,000

4,600,000

 

kW

6,736

4,627

3,749

3,192

2,841

2,577

2,372

2,197

2,109

1,962

1,757

1,611

1,464

1,347

20

Table 11.  SUGGESTED PIPE SIZE FOR MULTIPLE GAS APPLIANCES (PROPANE GAS)

Nominal

 

 

 

Maximum Capacity of Pipe in BTU/hr and kW for Gas Pressures of 14 in. W.C. (0.5 psi) or Less and

 

 

Iron Pipe

 

 

 

a Pressure Drop of 0.5 in. W.C. (based on 0.60 Specific Gravity Gas w/Heating Value of 1,000 BTU’s/Ft3)

 

 

Size

 

 

 

 

 

 

Length of Pipe in Feet (Meters)

 

 

 

 

 

(Inches)

 

10 (3.05)

20 (6.1)

30 (9.14)

40 (12.19)

50 (15.24)

60 (18.29)

70 (21.34)

80 (24.38)

90 (27.43)

100 (30.48)

125 (38.1)

150

175

200

1 1/2

BTU/hr

3,276,000

2,277,600

1,840,800

1,544,400

1,404,000

1,263,600

1,170,000

1,076,400

1,014,000

967,200

858,000

780,000

717,600

670,800

 

kW

959

667

539

452

411

370

343

315

297

283

251

228

210

196

2

BTU/hr

6,162,000

4,290,000

3,432,000

2,964,000

2,620,800

2,371,200

2,184,000

2,028,000

1,903,200

1,794,000

1,591,200

1,482,000

1,326,000

1,248,000

 

kW

1,805

1,256

1,005

868

768

694

640

594

557

525

466

434

388

366

2 1/2

BTU/hr

9,828,000

6,786,000

5,491,200

4,680,000

4,134,000

3,744,000

3,510,000

3,198,000

3,042,000

2,886,000

2,574,000

2,340,000

2,137,200

1,999,800

 

kW

2,878

1,987

1,608

1,371

1,211

1,097

1,028

937

891

845

754

685

626

585

3

BTU/hr

17,160,000

12,012,000

9,750,000

8,268,000

7,410,000

6,708,000

6,084,000

5,772,000

5,382,000

5,070,000

4,602,000

4,134,000

3,822,000

3,556,800

 

kW

5,026

3,518

2,856

2,421

2,170

1,965

1,782

1,690

1,576

1,485

1,348

1,211

1,119

1,042

4

BTU/hr

35,880,000

24,648,000

19,968,000

17,004,000

15,132,000

13,728,000

12,636,000

11,700,000

11,232,000

10,452,000

9,360,000

8,580,000

7,800,000

7,176,000

 

kW

10,508

7,219

5,848

4,980

4,432

4,021

3,701

3,427

3,290

3,061

2,741

2,513

2,284

2,102

Page 20
Image 20
A.O. Smith 3400, 2600, 1700, 2000 instruction manual Suggested Pipe Size for Multiple GAS Appliances Natural GAS

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