This category of steel tubes is generally made out of MS Galvanized Sheets. There are many preventive coatings (natural & synthetic) which are applied either before or after the production of tubes.
In the recent technological innovations and analysis by the experts, it has been proved that the tubes made by galvanized sheets are giving very good durability, stability, adherence as well as a longer sustainability without atmospheric corrosion. These technological phenomenon are adopted by the steel manufacturers for enhancing their market potential as well as the profitability as they have very optimum cost control parameters.
The coating is uniform and the thickness of the coating can be maintained as agreed between, which depends on the atmospheric and corrosive environment prevailing at individual sites. The overall look & finish is very aesthetically controlled. Having a homogeneous coating all through, these tubes can easily withstand any mechanical deformation without affecting their catalytic coating and the bonding of zinc coating with the parent material remains unchanged.
This gives a very good impression to the fence & green house fabricator. Strict in-house quality checking is performed which helps in maintaining all conditioning parameters as per the standards laid down.
APL Apollo is an integrated management system certified company covering ISO 9001 : 2008, ISO 14001 : 2004 and OHSAS 18001 : 2007 having strong domestic customer base and exports to over 25 countries. We believe that the best way to ensure quality maintenance is by installing equipments and adapting processes that are capable of producing it.
We have been living up to the continuously changing scenarios maintaining one of the best infrastructures in the industry. The superior quality black and galvanized steel tubes are produced on modern high speed tube mills based on the latest technology of world leader M/s Kusakabe of Japan. Apart from the complete in-house quality inspection facilities at various stages starting from procurement of raw material till final dispatch of finished goods, we have complete infrastructure of Coil slitting, Tube Making, End Facing, Hydro testing, Pickling & Galvanizing and Threading & Bundling.
Our mills are fully computerized and operate at a speed of 110 meters / minute ensuring steel tubes production with accurate roundness, straightness, length and strong weld joints. These mills possess quick size changing facility with spare cassettes which reduce the down time and enable us to deliver faster.
We have 'Online NDT' Eddy Current Testing which works in synchronization with automatic sorting system installed at our plant ensuring automatic segregation of Good Tubes and Bad Tubes. This system not only marks out the rejects but also ensures efficient monitoring of equipment performance and rejection levels.
While our customers get Eddy Current tested quality tubes, the constantly monitored quality index yields productivity advantage. Better yield because of law rejections give direct price competitiveness to our product.
APL Apollo Hollow Sections - Superior is a word that falls short when it comes to quality
The Company markets its product under the brand APL Apollo which covers MS Black, G.I. Round pipes and Hollow Sections both in Rectangular and Square Quality rolled on High Frequency Induct Weld (HFIW) mills. These mills have been designed on latest technology provided by M/s Kusakabe of Japan who are the world leaders in welded Tube Mill technology. We have five mills at Unit - I, Sikandrabad and two mills at Unit - II, Hosar having installed capacity of 3,25,000 MT per annum.
Structural Par Excellence
International quality raw material
Enhanced physical strength provides decisive advantage
Formed at modern HFIW mill under strict quality control
Unique Strength & Economy
Increased tensile capacity because of concentric connection
Increased compressive strength because of higher radius of gyration
Full strength under moment due to superior torsional rigidity
Enhanced shear capacity
Multifold tensional capacity
Lower wind drag
Better fire resistance
The best during earthquakes
The Hollow Sections are perfect substitude for conventional angle and channels and the market is diversifying to adopt the sections for the reason of overall cost saving of 15%. In addition to this, the maintenance of these sections is very cheap and it has a better aesthetic look.
Advantage of Using Hollow Sections (RHS / SHS)
Hollow Sections (RHS / SHS manufactured by APL Apollo Tubes ) command several techno-economic advantages over Conventional Structurals.
The raw Material for these structurals come from SAIL state-of-the-art Hot Strip Mill which manufacturers Hot Rolled Coils comparable to the best in the world.
The excellent distribution of the materials around the axis of Hollow Sections exhibit remarkable strength qualities and thus offers decisive advantage as regards to application technology.
Due to their high torsional rigidity and attainment of substantial impact in the material, Hollow Sections behave more efficiently than conventional structurals.
Their higher strength to weight ratio result in up to 30% saving in steel.
The smooth, uniform profile of these sections minimizes corrosion and facilitates easy, at-site fabrication.
Hollow Sections also enhance the aesthetic appeal of structures.
Cold formed Hollow Section is a formed product whereas conventional structure is a rolled product, so the material ductility vis-à-vis with the strength remains stationary and uniform in cold formed Hollow Section which gives a very suitable calculation to the structural engineers / consultants.
The Question Of Internal Corrosion
Internal corrosion is further protected by applying the surface with any protective coating preferably the polymer base or suitably passivated as a protection from surface oxidation / corrosion