Tectubi Bending - Product range

Product range

Tectubi Raccordi Bending Division produces large radius bends and clad bends. Both hot and cold bending processes are used for: carbon and alloy steel for moderate and elevated temperatures; high yield steel; carbon and alloy steel for low temperature service; stainless steel; austenitic/ferritic stainless steel; nickel alloy; titanium alloy and aluminium alloy.

The cold bending method, as the result of a registered industrial patent used exclusively by the company, delivers an identical structure to that of the original tube, so the product does not need further heat treatment when the mechanical characteristics comply.

The bends are destined mostly for the oil & gas pipeline and power sectors, and can also be used for civil engineering works.

Hot bending

Clad induction bending

Cold bending

The company has recently increased its capacity with the purchase of a new induction bending machine, Schäfer SRBMI 1400. This machine enables the production of bends in diameter from 2” to 56”, bending radius from 250 mm to 10,000 mm and thickness from 7 mm to 100 mm.

The machines, electronically interfaced, are provided with a control system which enables them to adapt to variations in load, while keeping control over the temperature, reducing heat losses to a minimum. The material properties are retained accordingly, even after the bending and heat treatment process, in accordance with applicable specifications.

Clad induction bending

Tectubi Raccordi Bending Division manufactures a wide range of clad induction bends for applications under the most demanding conditions and services. All bends with R/D<4 are offered as hot induction bends, whereas for R/D≥4, Tectubi Raccordi offers cold formed bends, as a valuable alternative to hot ones.

Allowances

3D Bends

Angle	30' ÷ 1°
Thickness	11% maximum reduction of extrados
Ovalisation	3.5%

5D Bends

Angle	30' ÷ 1°
Thickness	8% maximum reduction of extrados
Ovalisation	2%

7D Bends

Angle	30' ÷ 1°
Thickness	6% maximum reduction of extrados
Ovalisation	1.5%

Characteristics

Machine		Cojafex PB 600	Cojafex PB 1000	Schäfer SBMI 1400
Bending radius		250 ÷ 3,050 mm	800 ÷ 5,100 mm	800 ÷ 10,000 mm
Diameter		2" ÷ 18"	8" ÷ 40"	8" ÷ 56"
Development		5,000 mm MAX	8,500 mm MAX	11,500 mm MAX
Pipe length		8,400 mm MAX	12,000 mm MAX	15,400 mm MAX
Thickness reduction	3D	11%	11%	11%
	5D	8%	8%	8%
	7D	6%	6%	6%

Clad induction bending - product range

Outside diameter	from 2" to 56"
Wall thickness	from 7 mm to 35 mm
Pipe length range	from 8.4 m to 15.4 m
Bending radius	from 250 mm to 10,000 mm
Maximum envelope	from 5 m to 11.5 m
Backing materials	carbon steels, hi-yeld grades, low alloy steels
Corrosion resistant alloy	S30403, S31603, S31703, S41000, N06625, N08825, etc.

The company’s cold bending process enables the manufacture of a wide range of products such as bends with radius exceeding 4D and angles up to 180°, with a minimal thickness reduction.

The bends can be in carbon steel, alloy steel, stainless steel, duplex and titanium, welded (SAW or ERW) or seamless, with diameters ranging from 2” to 60”.

Allowances

4D Bends

External diameter	+0% -3%
Angle	30' ÷ 1°
Thickness	11% maximum reduction of extrados
Ovalisation	3%

5D Bends

External diameter	+0% -2%
Angle	30' ÷ 1°
Thickness	8% maximum reduction of extrados
Ovalisation	2%

7D Bends

External diameter	+0% -1,5%
Angle	30' ÷ 1°
Thickness	6% maximum reduction of extrados
Ovalisation	1,5%

Product range

Hot bending

Clad induction bending

Cold bending

Clad induction bending

Allowances

Characteristics

Clad induction bending - product range

Allowances

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