Mss sp-44 steel pipeline flanges
Aws eg3.0 96 training welder-level-11
Aws visial inspection of pressure vessel and pressure piping(1)
SSPC SP13 : 2000
Aws b2.1
76790199-IEEE-80-2000
api-581-2000.pdf
BS 434 Part 2
6d - Pipeline Valves
API 2001 Fire Protection Refineries
API 421 Separadores API Crudo-Agua
API 2009 Seguridad Tuberias
