RE:Back Purging Requirements for Stainless Steel Welding berkshire (Aeronautics) 4 Sep 16 18:16 If the inside of the pipe can be reached , you could also use pickling paste to remove the heat tint, but it is better not to have it there in the first place. Back purge stainless pipe? - Miller Welding Discussion ForumsNov 22, 2010 · For stainless steel welding you should purge to an oxygen level of 0.1% (1,000 parts per million). In our fab shop we have the luxury of using a O2 sniffer that we use in confined space entry cases. Purging is normally carried out with argon gas as it is totally inert and as it is readily available in the welding environment.
Its possible- route run welding of ss 316L pipes without purging?.. by Prethyush R ( Mumbai, India) is there any special electrodes / filler wire available for route run welding of SS 316L pipes without using purging my requirement no of joints are very large so it is not economic to use gas purging.also Pipes size ranges varies from 2 inch to 8 inch. NITROGEN PURGE? - American Welding SocietyJan 16, 2008 · I have not personally worked with nitrogen purging of 300 series stainless steel, but have heard about it over the years. AWS C5.5/C5.5M:2003, Recommended Practices for Gas Tungsten Arc Welding, states that nitrogen is widely used in Europe as a purge gas, and that it is used for austenitic stainless steel, copper, nickel alloys, carbon and low alloy steels, but it should not be used Pipe Purging Equipment for Welding:Pipe Purge Dams for Pipe Purging Equipment. PPM Pipe Purging Equipment is used in stainless steel and exotic pipe fabrication, saving the user time and gas, which also means saving money! A better weld is also achieved by controlling the environment inside of the pipe. PPM pipe purge systems create a seal or dam on both sides of the weld.
Pipe Purging Equipment. PPM Pipe Purging Equipment is used in stainless steel and exotic pipe fabrication, saving the user time and gas, which also means saving money! A better weld is also achieved by controlling the environment inside of the pipe. PPM pipe purge systems create a seal or dam on both sides of the weld. Pipe Weld Purging Systems - Weld Purge Monitor, Pipe Argweld® PurgElite® Inflatable Tube and Pipe Weld Purging Systems 1 to 24" (25 to 610 mm) with innovative 1" (25 mm) Ideal for use with polished internal surfaces of stainless steel tubes, the Argweld® Family Range of Inflatable Tube, Pipe and Pipeline Weld Purging Systems were first designed and developed by Huntingdon Fusion Techniques in 1975. Purging Equipment QWS - Welding Supply SolutionsQWS / Queensland Welding Supplies is Australia's leading supplier of high performance TIG, MIG, MMA and plasma cutters, with a focus on digital-technology. QWS offers a complete range of welding, engineering & industrial supply solutions. We have Australia's largest range of welding
Jun 16, 2009 · Topic Welding Industry / General Welding Discussion / Purging ss pipe tig By Daniel McDowell Date 06-15-2009 18:10 Looking for solid advice on pipe purging ss tig, all diamiters and types of ss. Gasses We use are pure argon or somtimes nitrogen mixes. Purging with Nitrogen in the Welding of Austenitic Purging with Nitrogen in the Welding of Austenitic Stainless Steels Tests show no difference in properties between nitrogen and argon purged joints BY C. V. SHIRWAIKAR AND G. P. REDDY ABSTRACT. In welding stainless steel components such as pipes and tubes where the back of the joint is not accessible for welding by the GTAW Shielding and Purging Gas for Welding of Piping Systems Shielding and Purging Gas Argon gas used in GTA welding for shielding purposes shall be 99.995% pure. The purity of the gas shall be certified by the manufacturer. Nitrogen, argon or helium may be employed for inner protection. However, nitrogen cannot be used in the case of weld materials having a high nickel content. Nitrogen is a acceptable 
crevice corrosion of the pipe. , Purge gas, backing fluxes fight off oxygen Purging stainless-steel pipe with ar-gon (or nitrogen for 300-series alloys with less than 10 percent nickel) re-quires the purge gas to flow long enough to displace the air from the pipe and create an atmosphere of less than 1 percent oxygen. Use of purge WHY PURGE - The Site for Tube and Pipe IndustriesWHY PURGE ? Purging for Pipe/Tube Welds - On Corrosion-Resistant Metals :When welding stainless steel, titanium and other corrosion-resistant materials, creating a perfect weld environment is of the utmost importance, because the desired corrosion resistance depends on it. During welding, the heated weld seam is exposed to air and oxidizes if Weld purging for tubes and pipes - stainless-steel Stainless Steel World M a 2014 1 WELDING High quality welds in pipes and tubes can only be assured if the weld underbead is protected from oxidation. The various techniques available through which protection can be given are referred to as purging. Keywords:Purge techniques, Welding, Weld purge, By Dr. M J Fletcher, Delta Consultants
Why should you use Inert Gas Purging when welding Stainless Steel, ium and Nickel Alloys? Preventing oxidation and thus avoiding discolouration and weld underbead discontinuities in tubes and pipes can be achieved readily by purging the inside with inert gas. This simple procedure saves both time and cost, both of which can be considerable. purging stainless pipe - Miller Welding Discussion ForumsThe bigger the pipe the more cfm needed to get the carbon dioxide out, once the pipe is full of purge gas you can back it down to approx. 15-20, If its 1-1/2" pipe or less I would back it down a little more. Purging is not something I do all the time so there may be others that can give you better advise. Welding 300-series pipe without back purgingWelding stainless steel tubes and pipes typically requires back purging with argon gas when using traditional processes, such as gas tungsten arc welding (GTAW) and shielded metal arc welding (SMAW). But the cost of the gas and the setup time for the purging process can be significant, especially as the pipe diameters and lengths increase.