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Re: ratio D/t in buried steel pipes

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To Raul Marino,

	Try Handbook of Steel Drainage and Highway Construction Products
published by American Iron and Steel Institute.

				Regards,

				H. Daryl Richardson

raul marino puebla mosquera wrote:
> 
> Dear friends
> 
> I need that somebody helps me in order to know where
> finding or as much as will be the relationship maximum
> D/ t (diameter/ thickness) for tubing of steel welded
> in order to be placed under soil.
> In my case the tubing it is of 3500 millimeters of
> diameter and 9.5 millimeters of thickness of wall.
> this steel pipes will place you rings of
> reinforcement.
> 
> I have requested the manual AWWA M11 but I don't still
> have this.
> 
> thank you advanced by their help.
> 
> regards
> 
> Raúl Marino
> 
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