Ingot Tong 250 ton: what about weight?
Ingot Tong 250 ton: what about weight?
(OP)
Ingot Tong 250 ton: what about weight?
I'm budgetting an ingot tong, capacity 250 ton, maximum open width 3500 mm,
minimum open width 1500 mm, ingot temperature 1300°C (just for sample: h
At the moment I need to know the weight and the material. I'm designing
it made of DILLIMAX 690. The weight is about 42.000 kg. My customer says
that our competitors can build it in S355 with a weight of about 33.000
kg.
Is there someone that can confirm me these data? I can't understand where I'm in mistake.....





RE: Ingot Tong 250 ton: what about weight?
RE: Ingot Tong 250 ton: what about weight?
doesn't sound real good for 1300deg ...
RE: Ingot Tong 250 ton: what about weight?
RE: Ingot Tong 250 ton: what about weight?
Maximum weight
Single or multiple pieces per lift
Temperature
Shear strength of the material
Maximum / minimum dimensions
Surface finish requirements
Crane limitations (rated capacity, available headroom)
RE: Ingot Tong 250 ton: what about weight?
htt
RE: Ingot Tong 250 ton: what about weight?
RE: Ingot Tong 250 ton: what about weight?
Some more specifications:
I don't know design (rules and so on) of my competitors, of course I'm giving all the best in my design, that's the why I'm trying to know if my result is quite good and my competitors are in mistake or the opposite!
About temperature: I made a calculation of thermal impact (radiaton, convection, conduction) and I think that the temperature of my tong will be about 150°C: in the contact point I use inox steel, in the rest of the ton I use thermal shields (inox plate not in contact, to reduce radiation effect).
I'm using UNI 13155 rule: max vertical force is double of ingot weight, max stress is yield stress when I consider a capacity double of the maximum (so say italian rules).
I ask again: does someone used a tong of this capacity or similar (2000/300 tons) and know the weight? Or my customer is making fun of me??
RE: Ingot Tong 250 ton: what about weight?
that's my take ! tell him that's this is your best design, and if he prefers the other, then that's the free market (capitalism) at work. but don't compromise your design (maybe take out some conservatism).
RE: Ingot Tong 250 ton: what about weight?
my design is this and I don't want to change anything against rules and safety.
But my customer (that will build the tong) is choosing his partner in engineering, and if my competitor is lighter than me he will prefer him, even if (my customer can't know that...) my competitor is in mistake!!
RE: Ingot Tong 250 ton: what about weight?
RE: Ingot Tong 250 ton: what about weight?
maybe your competitor is compliant, maybe he isn't.
maybe he's hoping to change the design later, at a design review.
it does seem "odd" ... your material is significantly superior (yes?), and presumably more expensive (per lb). typically you'd think that better material properties are off-set with a lighter component.