High Temperature Systems, Inc.
16755 Park Circle Drive
Chagrin Falls, OH 44023
Phone: (440) 543-8271
Fax:    (440) 543-8198
Email: Inquiry Form
Web:   www.hitemp.com
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Impregtite Graphite Heat Exchangers
GENERAL FEATURES
IMPREG-TITE
 
STANDARD SHELL & TUBE EXCHANGERS RESISTANT TO CHEMICAL ATTACK FROM ACIDS, ALKALIES, SOLVENTS AND SALTS.
 
IMPREG-TITE as a material of construction combines graphite, one of the most chemically inert materials, unequaled in heat transfer characteristics, with a series of resins to give the engineer a new dimension in heat transfer design in this energy and environment conscious world.
 
CORROSION RESISTANCE CHARACTERISTICS
 
Impreg-tite is virtually immune to thermal shocks and can typically handle difficult solutions such as hydrochloric, sulfuric and hydrofluoric acids, halogenated organics and aequous salt solutions. Active Chemical Systems, Inc. has accumulated considerable corrosion data on Impreg-tite and can provide to you the benefit of our extensive practical experience in handling difficult solutions. As a matter of policy ACS may furnish suitable test coupons or a complete test unit for some applications involving combinations of difficult chemicals or proprietary intermediates.
 
THERMAL CHARACTERISTICS
 
Impreg-tite impervious graphite is immune to thermal shock within its operating limits (340°F) and has a thermal conductivity of 1020 BTU/HR Sq. Ft. (°F/in), 9 times stainless steel, 6 times Monel, 3 times tantalum and 2.2 times carbon steel! The maximum recommended operating temperature for lmpreg-tite is 340°F.
 
MECHANICAL CHARACTERISTICS

Impreg-tite is immune to plastic deformation, will not cold flow, creep, swell or set. Impreg-tite is inert, will not flake or rub off and contaminate practically all chemical solutions. Impreg-tite is not subject to change with age or exposure to cycles of temperature and pressures.
 
PROPERTIES
MECHANICAL THERMAL
Density (lbs. cu. ft.) 109 Temperature Resistance °F 340
Effective Porosity (%) none Thermal Expansion (in. in F x 107) 25.4
Tensile Strength (psi) 2600 Thermal Conductivity BTU/hr./sq. ft./(F/in.) 1020
Compressive Strength (psi) 8900    
Transverse Strength (psi) 4650
Modulus of Elasticity (105) 23
 
DESIGN CHARACTERISTICS
 
Because of superior corrosion resistance, Impreg-tite does not require a "corrosion allowance". Corrosive fluids are normally handled inside Impreg-tite tubes for easy cleaning. The corrosive fluid comes in contact with only Impreg-tite tubes, tube sheets and domes. Suitable gaskets are furnished on application. Shells are usually furnished in carbon steel for heating with steam or cooling with process water. However, they can be furnished in Haveg, FRP, rubber lined steel or stainless for handling two corrosives simultaneously.
 
OPERATING LIMITS

Impreg-tite heat exchangers can be designed for 50 or 75 psig or full vacuum on both tube and shell sides. Maximum operating temperature is 340°F. Maximum recommended steam pressure is 50 psig.
 
TESTING
 
Each individual Impreg-tite component is air tested before assembly. Upon completion, the unit is hydrostatically tested at 1-1/2 times the working pressure.
 

 
Tube
Length
(Ft.)		 Dim.
In.		 Shell Diameter
6 8 10 14 16 18 20

6

A

86-1/4

88-1/4

89-1/4

95-1/2

96-1/2

97-3/4

99-1/2

B

61

55

55

57

57

57

57

9

A

122-1/4

124-1/4

125-1/4

131-1/2

132-1/2

133-3/4

135-1/2

B

97

91

91

93

93

93

93

12

A

158-1/4

160-1/4

161-1/4

167-1/2

168-1/2

169-3/4

171-1/2

B

133

127

127

129

129

129

129

14

A

182-1/4

184-1/4

185-1/4

191-1/2

192-1/2

193-3/4

195-1/2

B

157

151

151

153

153

153

153

16

A

206-1/4

208-1/4

209-1/4

215-1/2

216-1/2

217-3/4

219-1/2

B

181

175

175

177

177

177

177

18

A

230-1/4

232-1/4

233-1/4

239-1/2

240-1/2

241-3/4

243-1/2

B

205

199

199

201

201

201

201

20

A

254-1/4

256-1/4

257-1/4

263-1/2

264-1/2

265-3/4

267-1/2

B

229

223

223

225

225

225

225

ALL

C

6-1/2

8-3/4

7-1/2

10-1/4

10-1/2

11

11-1/2

D

4-3/8

5-1/4

5-3/4

8-3/4

8

8-1/2

9-1/8

TUBE

N1

21 PS

3

4

4

4

4

4

N2

21 PS

3

4

4

4

4

4

LENGTHS

H

4-13/16

8

9-1/4

11

12

13

14

Pmax

3

4

6

6

8

8

10
 

G

11

1 3-1/2

16

18

20

22

24

O. D.

6-5/8

8-5/8

10-3/4

14

16

18

20
 
Tube
Length
(Ft.)		 Dim.
In.		 Shell Diameter
22 24 26 28 30 34 38

6

A

100-1/4

103

107-1/2

114

115-1/2

124-1/4

127

B

53

53

52

51

51

50

47

9

A

136-1/4

139

143-1/2

150

151-1/2

160-1/4

163

B

89

89

88

87

87

86

83

12

A

172-1/4

175

179-1/2

186

187-1/2

196-1/4

198

B

125

125

124

123

123

122

119

14

A

196-1/4

199

203-1/2

210

211-1/2

220-1/4

223

B

149

149

148

147

147

146

142

16

A

220-1/4

223

227-1/2

233

235-1/2

244-1/4

247

B

173

173

172

171

171

170

167

18

A

244-1/4

247

251 -1/2

258

259-1/2

268-1/4

271

B

197

197

196

195

195

194

191

20

A

268-1/4

271

275-1/2

282

283-1/2

292-1/4

295

B

221

221

220

219

219

218

215

ALL

C

12-1/4

13-3/4

14-1/4

16-1/4

16-1/2

17

20-1/4

D

9-3/8

10-5/8

23-1/4

29-1/4

30-1/2

38-1/4

40-1/4

TUBE

N1

6

6

6

8

8

8

10

N2

6 x 8

6 x 8

6 x 8

8

8

8 x 10

10

LENGTHS

H

15

16

17

20

21

23

25

Pmax

10

12

12

16

16

20

20
 

G

26

28

30

32

34

38

42

O. D.

22

24

26

28

30

34

38
 
OUTSIDE HEAT TRANSFER AREA (SQ. FT.)
FLOATING TUBE SHEET DESIGN
 
Nominal
Shell
Dia. In.		 No.
Tubes		 Tube Length Ft.

6

9

12

14

16

18

20

6

9

17.7

26.5

35.3

41.2

47

53

59

8

19

37.2

55.8

74.5

87

99.4

112

124.5

10

31

60.9

91.2

122

142

162

182.4

203

14

42

82

123

164

192

220

247

275

16

64

125

188

250

293

335

377

418

18

85

166

250

334

389

445

500

556

20

109

214

320

427

499

571

642

713

22

130

255

382

510

595

681

766

850

24

163

320

478

640

746

854

960

1066

26

199

390

585

780

910

1040

1175

1300

28

230

452

678

904

1055

1205

1355

1505

30

268

525

790

1050

1230

1400

1580

1755

34

349

685

1025

1370

1600

1830

2055

2283

38

439

860

1290

1720

2010

2300

2585

3875
 
DOMES
 
Domes are normally furnished in Impreg-tite impervious graphite. Steel or FRP armoring can be furnished to protect the Impreg-tite from mechanical abuse or to conform to specific codes. Single pass or multi-pass construction is furnished to meet your requirements. Nozzles adhere to ANSI 150# flange standards. Nozzles can be furnished either as axial, radial or in combination for liquid-vapor separation.
 

 
TUBE SIZE AND PITCH
 
Standard tube size 7/8" ID x 1-1/4" OD on 600 triangular pitch. Standard tube pitch is 1-17/32". Larger tube pitch is available for easy mechanical cleaning or to reduce pressure drop across tube bundle.
 

 
SHELL SIDE BAFFLES
 
Baffles are normally furnished in corrosion resistant FRP, which will not corrode to produce sharp knife edges which can damage graphite tubes. Stainless steel, coated steel or alloy can also be furnished.