ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.ġ.1 This practice covers recommendations and precautions for cleaning, descaling, and passivating of new stainless steel parts, assemblies, equipment, and installed systems. It is informational only and not an official part of the standard the full text of the standard itself must be referred to for its use and application. This abstract is a brief summary of the referenced standard. Precaution shall always be practiced to minimize iron contamination, in reuse of cleaning and pickling solution, in water rinsing, in circulation of cleaning solutions and rinse water, in protection of cleaned surfaces, for safety, and disposal of used solutions and water. Precision inspection shall be performed by solvent-ring test, black light inspection, atomizer test, and ferroxyl test. The following shall be used as the basis for cleanness acceptability: Visual inspection wipe tests residual pattern water-break test free iron test such as water-wetting or drying high-humidity test and copper sulfate test. Recommended cleaning practices shall be followed for welds and weld-joint areas, specially critical applications, installed systems and post-erections. Degreasing and general cleaning shall be accomplished by immersion in, swabbing with, or spraying with alkaline, emulsion, chelate, acid, solvent, or detergent cleaners or a combination of these by vapor degreasing by ultrasonics using various cleaners by steam, with or without a cleaner or by high-pressure water-jetting.

Scales shall be removed through chemical descaling, acid pickling, and mechanical descaling. Consideration shall be given in the design of parts, equipment, and systems that will require cleaning to minimize the presence of areas in which dirt, or cleaning solutions might become trapped, and to provide for effective circulation and removal of cleaning solutions. This practice covers the standard recommendations and precautions for cleaning, descaling, and passivating of new stainless steel parts, assemblies, equipment, and installed systems.

Stainless steel 6.4 units