ALLOWABLE PIPE SIZE, CLASS AND MATERIALS FOR …
as Series 1 (ISO size) pipe which is commonly solvent welded and not permitted for SA Water’s water main infrastructure. In the case of DICL pipe it is acknowledged that both PN 20 and PN 35 are manufactured. PN 20 is only manufactured in sizes DN225and greater and has a thinner wall thickness than PN35 pipe. PN35 has however been
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