Sincerely hope we become long-term partners - Steel pipe & Fittings:

Concrete pump inner-hardened pipe

Wall thickness: 4.0mm, 4.5mm, 5.0mm, 7.5mm etc.

Color: according to customers' requirement

1.The concrete pump straight pipe is made of special alloy steel ( 45Mn2). The inner pipe wall is case hardened by CNC high-frequency induction hardening machine. The inner pipe wall becomes a wearable layer with high hardness. The service life of the inner-hardened concrete pump boom pipe is as 3 to 5 times as normal concrete pump pipe.

2.Heat treatment process: Case hardening by high-frequency induction quenching

3.Wall thickness of the pipe: 4.00mm, 4.50mm, 7.50mm

4.Hardness:

HRC58-HRC62 for inner quenching layer;

HRC35-HRC40 for transition layer;

HRC25-HRC30 for protective layer

Specification	Inner diameter(mm)	Outer diameter (mm)	Wall thickness(mm)	Length(mm)	The wall thickness of quenching layer(mm)	Weight(kg)	Working pressure
Concrete pump Boom pipe	125	133	4	3000	1.50-1.80	48	85 bar
Concrete pump Boom pipe	125	133	4.5	3000	1.50-1.80	45	85 bar
Concrete pump Deck pipe	125	140	7.5	3000	2.5	85	85 bar