Orbital Welding Procedure for purified water system

Orbital Welding Procedure for purified water system

  • Objective : To get more consistent root weld beads and weld overrun, pinholes should be absent.
  • Scope :This SOP is applicable for Orbital Welding of purified water system
  • Procedure :
  • Ensure the welder is qualified before starting of welding.
  • Clamp the welding head at position of welding joint.
  • Centre the tungsten tip over the weld joint contact surface.
  • Attach purge gas source to open end of system being welded preferably at point that is the lowest point & Purge gas Vent point at the opposite to gas source point.
  • Set the weld parameters in the orbital welding machine as per the component.
  • Isolate the inner surface of the components being welded properly by providing non oxidising gas as surrounding environment.
  • Ensure the ends of the components being welded are properly aligned and carry out the welding activity.
  • Collect two weld samples with same set parameters and verify that they meet acceptance criteria.
  • Continue till samples meet the acceptance criteria. Set parameters of the acceptable samples shall be recorded and the same shall be followed to carryout welding regularly.
  • Use the equipment setting and other supplies (Purging gas, Electrode etc.), which were approved at the beginning of the day.
  • The test weld samples inspected should be permanently marked to identify the weld. Recording of the set parameters / observations shall be done in this form.
  • Attach the orbital welding report printout with this form.
  • After finish welding allow to cool joint slowly at room temp.
  • Clean OD only with fine K-2 paste / scotch brite.
  • Observation should be filled in Orbital Observation Sheet.




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Ms. Abha Maurya is the Author and founder of pharmaceutical guidance, he is a pharmaceutical Professional from India having more than 18 years of rich experience in pharmaceutical field. During his career, he work in quality assurance department with multinational company’s i.e Zydus Cadila Ltd, Unichem Laboratories Ltd, Indoco remedies Ltd, Panacea Biotec Ltd, Nectar life Science Ltd. During his experience, he face may regulatory Audit i.e. USFDA, MHRA, ANVISA, MCC, TGA, EU –GMP, WHO –Geneva, ISO 9001-2008 and many ROW Regularities Audit i.e.Uganda,Kenya, Tanzania, Zimbabwe. He is currently leading a regulatory pharmaceutical company as a head Quality. You can join him by Email, Facebook, Google+, Twitter and YouTube

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