This video shows the joining process for Stainless Steel plumbing Systems. The innovative press fit design saves both time as well as labor and the necessary skills can be imparted in a very short time.
Tuesday, 29 June 2010
Monday, 28 June 2010
I would like to initiate a discussion on how Stainless steel helps in getting points for LEED certification. Stainless Steel properties like Hygiene, High flow rate, Corrosion resistance leading to minimum maintenance/ replacements, improved building life, recyclable material etc, will all help in sustainable and green construction.
The Following website link provides a good repository of information on LEED certification.
http://www.leeduser.com/leed-credits#NC-2009
The Following website link provides a good repository of information on LEED certification.
http://www.leeduser.com/leed-credits#NC-2009
Types 304L and 316L stainless steel has been used extensively and very successfully for piping and a wide variety of other applications in waste water treatment plants. Stainless steel offers higher design strengths, thereby allowing lighter weight construction, and exhibits very low corrosion characteristics.
Material Benefits
• Stainless steel has a very low general corrosion rate in water and no corrosion allowance is required.
• It can withstand very high flow rates - in excess of 40m/s.
• Combining corrosion resistance with high strength allows reduction in section diameter, wall thickness and weight, making it quick and easy to install.
• It is ductile and, using the appropriate tooling, is not difficult to bend and cut.
• Stainless steel pressfittings, in particular, are easy to use for joints, and ideal for installation in areas with limited space and access or where the use of heat would be a problem.
• Stainless steel has a very low general corrosion rate in water and no corrosion allowance is required.
• It can withstand very high flow rates - in excess of 40m/s.
• Combining corrosion resistance with high strength allows reduction in section diameter, wall thickness and weight, making it quick and easy to install.
• It is ductile and, using the appropriate tooling, is not difficult to bend and cut.
• Stainless steel pressfittings, in particular, are easy to use for joints, and ideal for installation in areas with limited space and access or where the use of heat would be a problem.
Environmental Benefits
• Stainless steel can be used in all types of water. Leaching of constituent alloys falls well within the limits allowed for products in contact with drinking water in public supply.
• It has excellent resistance to the full range of potable waters (including the various chloride levels) covered by the European Drinking Water Directive.
• Stainless steel installation is clean and, if properly carried out, does not contaminate the system and reduces flushing times.
• No heat is required to form a joint or a groove, reducing fire hazards. Therefore hot work permits are not required.
• Stainless steel is fully recyclable.
• Stainless steel can be used in all types of water. Leaching of constituent alloys falls well within the limits allowed for products in contact with drinking water in public supply.
• It has excellent resistance to the full range of potable waters (including the various chloride levels) covered by the European Drinking Water Directive.
• Stainless steel installation is clean and, if properly carried out, does not contaminate the system and reduces flushing times.
• No heat is required to form a joint or a groove, reducing fire hazards. Therefore hot work permits are not required.
• Stainless steel is fully recyclable.
Economic Benefits
• The expected lifetime of a stainless steel system is more than 50 years, longer than is typical for competing materials.
• Stainless steel requires no additional coating.
• No maintenance is required after installation, reducing system down time, replacement and
maintenance costs over the life-cycle of the installation.
• The expected lifetime of a stainless steel system is more than 50 years, longer than is typical for competing materials.
• Stainless steel requires no additional coating.
• No maintenance is required after installation, reducing system down time, replacement and
maintenance costs over the life-cycle of the installation.
• Although initial costs may be higher than for the competing materials, such as copper and plastic, the economic benefits of using stainless steel increase over time.
• At the end of its useful life, stainless steel is fully recyclable and retains a higher residual scrap value than ordinary steel.
www.bssa.org.uk/
Nickel Magazine, March 2005 -- The piping systems that deliver potable water and fire-fighting capabilities in tall buildings have unique requirements. They must be able to withstand not only high pressures but the motion of the building caused by seismic and wind forces. Speed and ease of assembly are also important during the construction phase as builders grapple with tighter deadlines and a more fluid, less skilled workforce.
As buildings grow ever taller, engineers are turning to stainless steel piping systems ( S30400 and S31600) to meet these needs. Three of the newest and tallest buildings in the world, the Taipei Financial Centre in Taiwan, the Aurora tower in Brisbane, Australia and the Petronas Twin Towers in Kuala Lumpur, are prime examples of this shift to high-pressure stainless steel piping systems in certain circumstances.
Various controlled studies have served to give confidence in the use of stainless steel plumbing systems. Two examples are:
1) A 10 year Japanese study covering tubing trials in 2 large buildings, a hotel and a supermarket, examined lengths of type 304 stainless pipework in waters ranging from pH 7.1-8.8, 20mg/l chlorides, residual chlorine levels of 0.1-0.9mg/l and 28-50oC. Connections were made using welds, soldered fittings, stainless pressfittings, bronze compression fittings and flanged joints.
No corrosion was found on any of the pipes or their welds even under sediment. Pressfittings proved a very acceptable form of connection and showed no signs of crevice corrosion. Some general corrosion had taken place on the bronze fittings but this was slight and would not influence service performance. The study showed good performance from soldered joints although care has to be taken with soldering as problems occurred years ago in Europe when chloride based fluxes were used rather than phosphoric acid fluxes. Soldering has also been associated with knife-line type of attack and recommendations for suitable silver solders should be obtained from suppliers. If flanged joints are used, a polymeric gasket material suitable for use with stainless steel should be chosen
2) In Scotland, soft aggressive drinking waters have caused serious leakage problems in copper pipework. This was of particular concern in hospitals. To evaluate stainless steel as a replacement, parts of one hospital were retubed in 304 and 316 stainless steels and examined 2 years later. The water had a chloride content of about 20mg/l and pH of 8. The hot water pipe was 55-65oC. As a result, 316L was the alloy chosen for health care premises in Scotland. The initial trials used copper based compression fittings whereas stainless steel pressfittings have been used in subsequent installations. 10 years on, the performance of the early installations with pressfittings was assessed by the NHS in Scotland with samples of tubing removed and evaluated. The performance of the pressfittings was found to be excellent with no corrosion at all found in hot or cold water tubing.
The link is:
http://cid-5dd969b2d3b67058.office.live.com/self.aspx/SS%20Plumbing/Corrosion%20-%20Copper%20and%20GI%20Tubes.pdf
Pravin Goel
Business Head - JSL Plumbing Systems
pgoel@hotmail.com
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