HF-N pipeline counterweight welded ntupu:
Ọ bụ waya nchara carbon dị ala maka nkwado nke pipeline kpuchiri ihe dị arọ. Ntupu na-agụnye eriri ahịrị 6 nke gbachiri nke ọma n'etiti eriri obe. Ntupu 2-inch nke nwere akụkụ abụọ n'etiti eriri ahịrị bụ maka mkpuchi ya na nkpuchi nke 1 inch.