St52concrete pump pipe; concrete pump straight pipe, concrete pump boom pipe; co 
Photo: St52concrete pump pipe; concrete pump straight pipe, concrete pump boom pipe; co rated
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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. Sin 1.Concrete pump boom pipe or deck pipe Heat treatment process: case hardening by high-frequency induction quenching Wall thickness of the pipe: 4.00mm, 4.50mm, 7.50mm Hardness: HRC58-HRC62 for inner quenching layer; HRC35-HRC40 for transition layer; HRC25-HRC30 for protective layer Service life: 30000 cubic meters MSN :jeangao1211@hotmail.com Skype :jeangao1211 Phone :+86 13730593715
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