that illustrate common surface defects. These photos allow inspectors to perform a direct side-by-side comparison with actual castings. Categorized Irregularities: It defines 12 specific types of surface irregularities, including: Cracks and hot tears (generally never acceptable). Shrinkage. Type III–IV: Sand inclusions and gas porosity. Type VII–X: Wrinkles/overlaps, cutting marks, scabs, and chaplets. Acceptance Criteria:
Because the standard relies heavily on high-quality images, the PDF format is particularly valuable—it preserves the resolution and clarity of reference photographs, which printed copies may degrade over time. mss sp 55 pdf
Subject: Update: MSS SP-55 Visual Inspection Standards for Steel Castings that illustrate common surface defects