公开(公告)号：US20160216050A1

公开(公告)日：2016-07-28

申请号：US15088840

申请日：2016-04-01

Applicant: SNAMPROGETTI S.p.A.

Inventor： Alessandro GIANAZZA ,  Luca MAIRANO ,  Giuseppe MERELLI ,  Domenico SANFILIPPO

IPC: F28F19/06 ,  F16L13/02 ,  B23P15/26 ,  F28F21/08

CPC classification number: F28F19/06 ,  B23P15/26 ,  F16L13/0236 ,  F28F9/18 ,  F28F21/081 ,  F28F21/084 ,  F28F21/086 ,  F28F2275/062 ,  F28F2275/068 ,  Y02P80/156 ,  Y10T29/49718

Abstract: A bimetallic tube consisting of at least one tubular element in a first metal resistant to the corrosive and/or erosive action of a process fluid with which it is put in contact, having at least one end, or an area close to an end, externally coated with a layer of a second metal, different from the first and more suitable, with respect to this, for being seal-welded to a support. Tube bundle equipment to be used for thermal exchange operations at high temperatures and pressures, under conditions of high aggressiveness of the process fluids, wherein the tube bundle comprises at least one tube having the above characteristics.Said equipment is particularly used as a heat exchanger and decomposer, for example as a stripper, in the cycle of urea synthesis processes where there are conditions of high pressure, high temperatures, high aggressiveness of the process fluids, and in which the tube bundle consists of at least one tube having the above characteristics.

Abstract translation: 一种双金属管，由至少一个第一金属管状元件组成，其耐受其与其接触的工艺流体的腐蚀性和/或侵蚀作用，具有至少一个端部或接近端部的区域，外部 涂覆有与第一金属不同的第二金属层，并且对于密封焊接到支撑体上。 管束设备，用于在高温和高压下在过程流体的高侵蚀性条件下进行热交换操作，其中管束包括至少一个具有上述特征的管。 所述设备在尿素合成过程的循环中特别用作热交换器和分解器，例如作为汽提器，其中存在高压，高温，过程流体的高侵蚀性，并且其中管束组成 具有上述特征的至少一个管。