lining of the inner surfaces of steel pipes

100501 · May 20, 2004

we are considering of purchasing steel pipes of 108" diameter.The factories are using cement mortar containing a special additive in the lining of the inner surfaces of the steel pipes , according to DIN 2614.
This additive is :"Mowilith LDM 7590 ". The thickness of the lining is about 5-6 mm
Our query is to know whether this additive is familiar to anyone? Is it suitable for use in potable water pipelines ?
Is there any known accumulating experience with it ? What is the durability of such lining ?

corrosionman · May 21, 2004

100501, I,ve never heard of the material but am puzzled by the proposal. Is the lining for resistance to erosion or corrosion and whichever it is surely 5 mm is very thin! In fact is there any resistance whatsoever from this thin layer

How is thickness controlled to ensure that maybe it is not only 1 or 2 mm in a few places.

Cement lined pipes are often centrifugally cast but I doubt if this can be done at this size because 1) tolerance on diameter.
2) Speed requirements of such a big pipe.

Possibly it is sprayed and maybe porous ? Cheers DW

100501 · May 24, 2004

Thanks Corrosionman,

First don't be puzzled... although the lining is thin (5-6 mm ) it has the capability to resist corrosion (according to the manufacturer ...). This additive, together with the cement mortar complies with the requirments of bonding( the bonding strength was tested and reached the value of 2.6 N/mm^2 !!), compressive strength( min. 50 N/mm^2)and tensile strength( min. 10 N/mm^2).
All we want to know, wether it is suitable for use in potable water pipelines , etc.
By the way, the lining is centrifugally cast with a special equipment.

tommyclose · Aug 13, 2005

I am in the CML process and would be interested to know more about this product with this additive ????

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lining of the inner surfaces of steel pipes

100501

Civil/Environmental

corrosionman

Mechanical

100501

Civil/Environmental

tommyclose

Industrial

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