Welded Tubes

Instinox, a worldwide brand that not just specialises in manufacturing welded tubes but also is a profound supplier of welded tubes. We stock more than 1200 tonnes of welded tubes in our warehouses all our activities are guided towards customer satisfaction. We aim to satisfy our customers first, and then look for money. Our special logistics team focuses on the delivery of the first model, which provides for instant dispatch against the receipt bank of transfer copy. The client does not have to wait to receive the goods after that. At Instinox, we try our best to avoid bottlenecks and delay at each stage.

Products produced under our surveillance are of the highest quality and match the optimum standards. Our finished goods have a legitimate surface finishing and brand marked. Proficiency is invariably sustained since our products are exported to more than 13 countries worldwide. Instinox also takes personalised marking as per customer requirements.

Square Hollow section

Square steel tube comes in different sizes, specifications and wall thicknesses. it is also called hot dip galvanised square tube. Its uniformness makes it ready to use and makes it visually appealing. It has a very high weight-to-strength ratio. It is easy to be blended into any shape, and because square steel tubing is not much expensive, it is cost efficient for large projects. It has a large diameter and square edges.

Rectangular Hollow Section

Rectangular steel tube also comes in different specifications, sizes and wall thicknesses. It is also perfectly uniform and has a longer breadth than the squared section. Its weight-to-strength ratio is higher as compared to other sections. It can be bent easily but takes a little more time. It is also inexpensive and good to use for all sort of projects. The cause of the deformation of rectangular tube welding.

Oval Tubes, Flat Oval and Elliptic Tube

The speciality of the oval tube is the form itself. One is the elliptic tube and the other the flat oval type. Oval tubes are mainly manufactured with a diameter of 1, 0 – 3, 0 mm. Different wall thickness, materials and surfaces as well as lengths can be produced on special requirements. These Steel Oval Tubes are endurable and long lasting. They are extensively used in various industrial and engineering applications.

Stainless Steel Oval Tube

Stainless steel oval tube is offered in grades 304 and 316 and has a wide choice of sizes. All to order, with a very large range on the shelf. It is majorly used in construction business and upholstery development. It is manufactured using cold drawn welding method.

Instinox production methods and finished products have special properties which are different than those of its competitors. Steel has salient properties that can be utilised to advantage in buried pipelines. The following are desirable requirements of buried, pressurised tubes. These requirements can be achieved by welded steel tube.

• Strength
• Ease of installation
• High-flow capacity
• Leak resistance
• Long service life
• Reliability and versatility
• Economy

• Longitudinal stress in the tubes could possibly be limited by the strength of welds. Protective coatings must be replaced over field welds.
• Steel tubes have high strength and stiffness (modulus of elasticity).
• Steel tubes are reliable because of their toughness (ductility).
• Transportation and installation of steel tubes are expedited because of light
  Weight and toughness — tolerance for forces, deformations and impacts that fracture brittle materials.
• Steel tubes are versatile because of its ductility, and because of common procedures for cutting and welding. Special sections can be fabricated to meet virtually any requirement. Steel tubes can be provided in virtually any size and strength.
• Steel tubes are cost effective over the design life of the tube.
• Buried tubes are the “guts” of our civil engineered infrastructure — the delivery system for many of our increasing demands for supply service. Steel tubes will figure significantly in the world’s growing infrastructures.
• All buried tube must be designed — both the tube and the soil embedment.

In the simplest terms, at Instinox, a welded tube is made by using a piece of steel strip, rolling it into a cylinder and then heating the edges and forging them together as the parent metals

• Tube diameter, material and wall thickness.
• Weld power/drive power availability
• Horsepower available
• Accumulator capacity
• Type odd cutoff and length of the weld
• Physical size of the tube

High-frequency Welding (HFW)

400 series and even 300 series of stainless steel are suitable for HF Welders if the tubing is for decorative speeds. . Nearly 95%of the HF welders sold are in the solid state, using transistors to generate the alternative frequency current. Researchers have been undertaken to weld products less than 1/4th inch in diameter and to extend the ability of the welder to produce a pressure quality weld on 300 stainless steel at high line speeds. Compared to other processes, HF process is of less than perfect edge registration.

Electric Resistance Welding (ERW)

Electric Resistance welding, accomplished through a rotary copper electrode, is used often for mild steel tube from 0.250 to 0.375 inch in diameter. This process is perfectly suitable for the smallest diameters, as the impeders needed for High Freq. welding cannot fit into the tiny/small tubes. As the welding transformer rotates, the copper electrodes come into contact with the tube edges, heating them so that they can be welded.

Gas Tungsten Arc Welding (GTAW)

GTAW process is used for pressure quality weld on 300 series stainless steel at low welding speeds. It produces a good and strong weld with a little bend.A welding torch with a tungsten tip, usually employing argon or an argon and oxygen mixture, heats the edges of the strip until the metal starts to melt, and the next pair of roll squeezes the strip’s edges together. In GTAW the edges registration is critical.

Laser Welding

Laser Welding is costlier than GTAW, but comparatively, it is faster. It is mainly used for exotic metals and 300 series stainless steel, though some manufacturers use it on 400 series stainless steel tube welding. Laser welding produces the smallest heat-affected zone (HAZ) and a bend even smaller than that produced by GTAW process. Since there is almost no change in the grain structure of the parent metal, the finished piece has greater flexibility than a GTAW part. However, with this technique, edge registration is more critical than with the others.