Gas heating method, and gas-heating piping member

Abstract

Provided are a heating method making it possible that when a gas inside the body of a piping member, such as a pipe, is heated, the heating efficiency is improved; and a gas-heating piping member making it possible to perform such a heating method easily. A heat keeping member 4 which can transmit a gas to be heated is inserted to the inside of a piping member body 1 into which the gas can be passed in a state that the heat keeping member is brought into close contact with the inside, and further the piping member body 1 is heated from the outside thereof by means of a heating means 2.

1 . A gas heating method, wherein a heat keeping member which can transmit a gas to be heated is inserted to the inside of a piping member body into which the gas can be passed in a state that the heat keeping member is brought into close contact with the inside, and further the piping member body is heated from the outside thereof by means of a heating means. 
   
   
       2 . The gas heating method according to  claim 1 , wherein the heat keeping member is made of a porous metal material. 
   
   
       3 . The gas heating method according to  claim 1 , wherein the heat keeping member is made of a porous metal material and a metallic core member. 
   
   
       4 . The gas heating method according to  claim 3 , wherein the porous metal material is a product wherein a porous metallic foil having slit and raised pieces is spirally laminated on itself. 
   
   
       5 . The gas heating method according to  claim 1 , wherein the heat keeping member is made of a large number of metallic spheres. 
   
   
       6 . A gas-heating piping member, comprising a hollow body to be heated from the outside thereof, and a heat keeping member which is formed to permit a gas to be heated to be passed into the member and is inserted to the inside of the body so as to be brought into close contact with the inside. 
   
   
       7 . The gas-heating piping member according to  claim 6 , wherein the heat keeping member is made of a porous metal material. 
   
   
       8 . The gas-heating piping member according to  claim 6 , wherein the heat keeping member is made of a porous metal material and a metallic core member. 
   
   
       9 . The gas-heating piping member according to  claim 8 , wherein the porous metal material is a product wherein a porous metallic foil having slit and raised pieces is spirally laminated on itself. 
   
   
       10 . The gas-heating piping member according to  claim 6 , wherein the heat keeping member is made of a large number of metallic spheres. 
   
   
       11 . The gas-heating piping member according to  claim 10 , wherein porous plates for hindering the movement of the metallic spheres in the passage direction are fitted to both ends of the heat keeping member. 
   
   
       12 . The gas-heating piping member according to  claim 11 , wherein one of the porous plates is urged toward the side of the other porous plate by means of an urging member. 
   
   
       13 . The gas-heating piping member according to  claim 12 , wherein the body comprises a tube and joint units fitted to both ends thereof, and a step for receiving one of the porous plates is formed in each of the joint units.