Houston, TX (PRWEB) June 21, 2013
Chem Ref Services have proudly served the Houston area since 2004 in the inspection industries. Chem Ref Services participates in an inspection group which has daily forums. A member of their group was in the process of performing crack repairs to an ASME SECT. VIII pressure vessel; the repair plan required the attachment of a reinforcement pad. He wanted to know where to find the information on performing a pneumatic test on a reinforcement pad after welding.
In the professional opinion of Chem Ref’s general manager Leon Charles, performing pneumatic testing of reinforcement pads after welding should reference T-1044 Pressure/Vacuum (Pressure Limits) unless specified in the applicable Mandatory Appendix of this Article or by the referencing Code Section, components that are to be pressure-leak tested shall not be tested at a pressure exceeding 25% of the Design Pressure.
The bubble forming solution shall produce a film that does not break away from the area to be tested, and the bubbles formed shall not break rapidly due to air drying or low surface tension. Household soap or detergents are not permitted as substitutes for bubble testing solutions.
An inspector experimented by mixing his own solution. His mixture consisted of 3 tablespoons of dish detergent solution, adding just enough water to make his fingers feel slippery, which produced a string of fine bubbles. He added his solution to a faint air leak that did not break rapidly due to air drying. He was questioned by an Area Inspector (AI) about this practice. He then demonstrated the equal sensitivity to snoop (Snoop is an approved bubble forming solution) The AI was OK with his mixture.
Recommendations: When leak testing large areas, vessel or piping circuit, a small garden sprayer can be used with the correct mixture of water and dish detergent solution or snoop. Household soap or detergents are not permitted.
Leon Charles, the general manager of Chem Ref Services is excited to provide API 510/570/653 quality inspectors and quality NDE personnel in this highly competitive industry. “We keep a pool of the best inspectors with 5 years or more experience to handle any uninspected incoming inspection situations,” says Leon.
Interested clients requiring professional inspection services can visit the home office at 10611 Palestine Street Houston, Texas, visit our web site at http://www.chemrefservices.com or call 832-706-0844 for additional information.