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does any one have a sheet for converting, HDPE/PVC OD sizes to Ductile Iron (dn) sizes? Ie if I have a 225mm HDPE pipe what size connection of DI would connect into that - (using an aquagrip flange adapter etc) would it be around 200mm (dn) DI?

Greenone, Sorry, but what is the SPCC Plans? We have looked at a worst case scenario ie all at once, just need something to back it up!!

Wondering if anyone could help? Have a problem where we are trying to calculate the time taken and the amount of oil (or other chemical) that would fill into a gully on the side of a road after a tanker spilled it's load on a road. Does anyone have any methods of solving this or encountered...

Have been investigating the pros and cons of using coiled HPPE pipe, it seems only valid for long sections due to high transport, and handaling costs.. can anyone shed some more light on the pros and cons of Coiled HPPE? and for that matter why HPPE is better than Ductile iron - Setting up a...

Really basic embarassing Question. Want to do a check on some of my modelling outputs. does anyone have a tried and trusted method to calculate Qbar for a small area (less than 100 hectares) for 1/30 year, 1/50 and 1/100 year? we have rainfall for these storms. thanks

Unfortunetly, we are looking at connecting the 2nd pipe using the initial method, you mentioned back flow, is there a way of avioding this (design or pipe angles etc?) Thanks for your Help.. we are using HPPE pipe at SDR 17.

Would be interesting to see the Salary range across different countries.... I graduated in Austrlaia and jumped onto a base salary of around 40 000 AUD (30 000 USD) but within 4 years I was on around 55 000 AUD (40 000 USD) That was with the government and a 36 hour week..... I then moved to...

Have been approached regarding connecting a 2nd pipeline into a proposed foul Sewer Main. - I can only see this occuring by several ways: 1. connecting the extra pipes under pressure using another pump station. 2. finishing the first pumped section into a wet well then using a 2nd pump station...

Another Question, Does both Elctro Fusion and Butt Fusion withstand high pressure pipes? Or does they also need Thrust blocks etc??

It would be very similar to your typical household, with your diurnal variances being around 6-8 am and 6-9pm at night. I would use the high end of the 250-160 L/head/day limit. So using sewers for adoption (UK)(who use a Peak design flow of 4000L/day/dwelling and using 3 people per house) you...

thanks for the reply, Is there any difference in the type of welding or method, for Water mains of foul sewer rising mains. If so does anyone know the Standard in Ireland or the UK?

Looking into building a pump station in a floodplain - bad practice but is there any Methods used? already looked at providing bunds around the perimeter of the PS, and also raising the hieght of the slab, and manhole, and waterproofing the kiosk.

I am currently designing 3km's of Rising main - yes way too long!!, and need info on using HPPE pipes and how you go about jioning/welding, laying them - as the contractor hasn't used them b4!!!!