hat
Apre soude, tout tib yo dwe chalè trete nan yon tanperati ki nan 1650 ° F (900 ℃) oswa pi wo ak ki te swiv pa refwadisman nan lè oswa nan chanm lan refwadisman nan yon kontwole-atmosfè gwo founo dife, Frèt-trase tib pral chalè trete apre a final frèt-trase pas nan yon tanperati ki 1200 ° F (650 ℃) oswa pi wo.
eng
After welding,all tubes shall be heat treated at a temperature of 1650°F(900?) or higher and followed by cooling in air or in the cooling chamber of a controlled-atmosphere furnace,Cold-drawn tubes shall be heat treated after the final cold-draw pass at a temperature of 1200°F(650?)or higher.