Fluid or Drinking Water Ducting Systems

Abstract

The use of a steel alloy for the production of fittings, particularly screw- or push-fit fitting, valves or compression joints as well as corresponding fittings, particularly screw- or push-fit fittings, valves or compression joints for fluid or drinking water ducting systems is described. Low-cost production of fittings, valves and compression joints at the same time with improved corrosion resistance is achieved by the use of a steel alloy, which beside iron has the following content of alloying constituents in weight percent: C≦0.05%, 11%≦Cr≦25%, Ni<5%, Mn≦2%, N≦0.25%.

1 . Use of a steel alloy for the production of fittings, particularly screw- or push-fit fittings, valves or compression joints for fluid or drinking water ducting systems, characterized in that the steel alloy, beside iron, has the following content of alloying constituents in weight percent:
   C≦0.05%,     11%≦Cr≦25%,     1%≦Ni≦3%,     1.0≦Mo≦2.5%,     Mn≦2%, and     N≦0.25%.   
     
     
         2 . Use according to  claim 1 , characterized in that the steel alloy has a Cr content of 16%≦Cr≦23% in weight percent. 
     
     
         3 . Use according to  claim 1 , characterized in that the steel alloy has a Ti-content of 0.15%≦Ti≦0.8% in weight percent. 
     
     
         4 . Use according to  claim 1 , characterized in that alternatively the steel alloy has a Mo-content of 1.8%≦Mo≦2.5% in weight percent. 
     
     
         5 . Use according to  claim 1 , characterized in that the steel alloy has a N content of N≦0.03%, preferably N≦0.015% in weight percent. 
     
     
         6 . Use according to  claim 1 , characterized in that the steel alloy is used for the production of fittings, particularly screw- or push-fit fitting, valves or compression joints for compressed air or fire-extinguishing circuits, drinking water supply systems or gas pipes. 
     
     
         7 . A fitting, particularly a screw- or push-fit fitting, valve or compression joint, comprising:
 a steel alloy, beside iron, having the following content of alloying constituents in weight percent:
   C≦0.05%, 
   11%≦Cr≦25%, 
   1%≦Ni≦3%, 
   1.0≦Mo≦2.5%, 
   Mn≦2%, and 
   N≦0.25%. 
   
     
     
         8 . The fitting of  claim 7  wherein the steel alloy includes a Cr content of 16%≦Cr≦23% in weight percent. 
     
     
         9 . The fitting of  claim 7  wherein the steel alloy includes a Ti-content of 0.15%≦Ti≦0.8% in weight percent. 
     
     
         10 . The fitting of  claim 7  wherein the steel alloy includes a Mo-content of 1.8%≦Mo≦2.5% in weight percent. 
     
     
         11 . The fitting of  claim 7  wherein the steel alloy includes a N content of N≦0.03%, preferably N≦0.015% in weight percent. 
     
     
         12 . The fitting of  claim 7  wherein the fitting is adapted for compressed an air or fire-extinguishing circuit, drinking water supply system or gas pipe.