Shell and tube heat exchange

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Product Description

The materials of shell and tube Heat Exchanger are generally carbon steel, stainless steel and copper. When the tube plate made of carbon steel is used as the cooler, the weld joint between the tube plate and the tube often leaks, and the leakage enters the cooling water system to pollute the environment and cause material waste.

In the manufacture of Shell And Tube Heat Exchanger, manual arc welding is usually used for the welding of tube sheet and tube. There are some defects in weld shape, such as depression, air hole, slag inclusion, etc., and the distribution of weld stress is uneven. When using, the tubesheet is in contact with the industrial cooling water, and the impurities, salts, gases and microorganisms in the industrial cooling water will form corrosion to the tubesheet and weld, which is what we often call electrochemical corrosion. The results show that there are various ions and dissolved oxygen in industrial water, whether it is fresh water or sea water. The concentration change of chlorine ion and oxygen plays an important role in the corrosion shape of metal. In addition, the complexity of metal structure also affects the corrosion morphology. Therefore, pitting corrosion and crevice corrosion are the main corrosion types of tubesheet and tubesheet welds. From the outside, there will be a lot of corrosion products and deposits on the surface of the tube sheet, with pits of different sizes distributed. When seawater is used as medium, galvanic corrosion will occur. Chemical corrosion is the corrosion of medium. If the tube sheet of heat exchanger contacts with various chemical media, it will be corroded by chemical medium. In addition, there will be bimetallic corrosion between the tube sheet and the tube.

Shell and Tube Heat Exchanger / Tube Shell Heat Exchanger/Plate Heat Exchanger

Nominal diameter	Number of passes	tube Quantity	Heat exchange area Nominal value/calculated value					Tube passage cross-sectional area Flow rate (m/hr) at 0.5m/sec		pressure (MPa)
			Tube length (m)					Φ25*2.5
			1500	2000	3000	4000	6000	Φ25*2
159	1	14	1.5/1.62	2/2.17	3/3.27			0.0044/0.0049	7.92/8.82	0.25
219	1	26	3/3.00	4/4.02	6/6.06	8/8.1		0.0082/0.0090	14.76/16.20	0.6
273	1	44	5/5.08	7/5.18	10/10.26	14/13.72	21/20.63	0.0138/0.0152	24.84/27.36	1.6
	2	40	5/4.62	6/6.19	9/9.33	12/12.47	19/18.76	0.0063/0.0069	11.24/12.42	2.5
325	1	60	7/6.93	9/9.28	14/14.00	19/18.71	28/28.13	0.0018/0.0208	33.84/37.44	0.6
	2	56	6/6.47	9/8.66	13/13.05	17/17.46	36/26.26	0.0088/0.0097	15.84/17.46	1
400	1	119	14/13.47	18/18.41	28/27.76	37/37.10	55/55.8	0.0374/0.0412	67.32/74.16	1.6
	2	110	13/12.70	17/17.02	26/25.66	14/34.20	50.51.58	0.0173/0.0190	31.14/34.20	2.5
500	1	185			45/4.15	55/57.68	85/86.74	0.0581/0.0641	104.58/115.38
	2	180			40/41.99	55/57.68	85/86.74	0.0283/0.0312	50.94/56.16
600	1	269			60/62.7	85/83.88	125/126.13	0.0845/0.0932	152.10/167.76
	2	266			60/32.05	80/82.94	125/14.72	0.0418/0.0461	75.24/83.98
700	1	379			90/88.41	1120/118.17	175/177.71	0.0091/0.1313	214.38/236.34
	2	358			85/83.51	110/111.62	165/167.85	0.0562/0.0620	101.14/111.60
800	1	511			120/119.20	160/159.16	240/239.60	0.1605/0.1770	288.90/318.60
	2	488			115/113.83	150/152.16	230/228.81	0.0767/0.0845	138.06/152.10
900	1	649			150/151.39	200/202.36	305/304.3	0.2039/0.2248	367.02/404.46
	2	630			145/146.96	195/196.44	295/295.40	0.0990/0.1091	178.20/196.38
1000	1	805			185/187.78	250/251.00	375/377.45	0.2529/0.2788	455.22/501.74
	2	792			185/184.75	245/246.95	370/371.36	0.1244/0.1374	223.92/246.96

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Shell and tube heat exchange

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