Fabrication drawing for 12″ NB pipe clamp (Type C) used on Valaris DS-4 ventlines. Detailed assembly for the STBD/AFT leg at Level 8. Incl. material list for SHS 100x100x6.3, 10-15mm thk plates, and M20/M16 bolt schedule. – steel to BS EN 10025 & 10210 – min 6mm fillet welds – includes clamp plates, gussets, etc. All dims in mm