What is the rough internal diameter of an old (60-90 years old) lead pipe that an external diameter of 59mm and is used for waste water?

[LordWest]

What is the rough internal diameter of an old (60-90 years old) lead pipe that an external diameter of 59mm and is used for waste water?
Thanks

 

[Dan]

Oooo i was intrigued with the answer to this. It must be 45mm ish surely

People used to fill them with sand and bash them down before weighing them in. So I've heard. Never actually held any in my hand in my lifetime and I'm 40-ish. Seen it in a dug hole but no way to tell from that it was connected to plastic.

 

[ShaunCorbs]

On average 20mm thinner than od so 40mm

 

[Dan]

Wow so it's about 10mm thick?! Can't see much gain in the sand trick it must be super heavy as is.

 

[LordWest]

ok, thanks all

 

[Last Plumber]

ok, thanks all

Depended on wall thickness:

1 3/4" internal diameter could be up to 2.37 inch external (60.2 mm)
2" internal could be 2.28 inch or 2.36 inch external ( 57.9 to 59.94 mm). There were quite a few possibilities all dependent on wall thickness. You would be better weighing it but that may not be possible.

Long and short is, it could be 1 3/4" or 2" lead pipe.

 

[Dan]

Depended on wall thickness:

1 3/4" internal diameter could be up to 2.37 inch external (60.2 mm)
2" internal could be 2.28 inch or 2.36 inch external ( 57.9 to 59.94 mm). There were quite a few possibilities all dependent on wall thickness. You would be better weighing it but that may not be possible.

Long and short is, it could be 1 3/4" or 2" lead pipe.

Oh I was assuming this was the external inlet. Are these really still found in properties?

 

[Last Plumber]

Oh I was assuming this was the external inlet. Are these really still found in properties?

Yes, there are properties left in my neck of the woods with that but they are getting fewer. This is a waste pipe. If you are thinking mains supply pipes then yes there are plenty of those still in use. They were usually 1/2" 6's, 7's or 9's around here and that meant that they were 1/2" bore and, 6lb, 7lb or 9lb per yard in weight. Wall thickness was determined by pressure. There are multiple bore and wall thicknesses in lead pipe.

 

[Dan]

Learned something there I have, nice one.