Mss Sp-55 Standard Pdf File

: Linear fractures caused by internal stresses during cooling. These are generally unacceptable.

MSS SP-55 is often used in conjunction with other major industry codes to provide a complete quality profile: mss sp-55 standard pdf

These photos categorize 12 different types of surface irregularities, showing clear examples of what is and what is unacceptable . The 12 Types of Irregularities : Linear fractures caused by internal stresses during

: Pits or trapped material on the surface. Shrinkage (Rechupe) : Voids caused by metal cooling. The 12 Types of Irregularities : Pits or

The standard provides a uniform "language" for manufacturers and inspectors to judge surface irregularities. It ensures that minor cosmetic flaws aren't rejected unnecessarily, while critical structural defects are caught. 🔍 What It Covers The standard defines : Type I: Cracks (Hot tears and Shrinkage cracks) Type II: Shrinkage (Internal voids) Type III: Inclusions (Sand, slag, or foreign material) Type IV: Internal Porosity (Gas holes) Type V: Chaplets (Visible fusion lines) Type VI: Surface Porosity (Pinhole clusters) Type VII: Scabs and Rat Tails Type VIII: Wrinkles, Laps, and Folds (Cold shuts) Type IX: Cutting Marks (Burner cuts) Type X: Scratches and Gouges Type XI: Grinding Marks Type XII: Wall Thickness (Under-thickness areas) ✅ Acceptance Criteria