Shree Harsiddhi Enterprise

Quality Assurance

• Uniform texture and color (no blotchy coating)

• No visible cracks or hairline fractures

• No cold shuts (lines where metal didn’t fuse properly)

• No porosity (small surface holes)

• No sand inclusion defects

• Smooth edges without sharp burrs

• Even thickness

• No peeling, flaking, or bubbling

• No bare metal exposure

• Proper adhesion (cross-hatch adhesion test recommended)

• Verify critical dimensions against drawings:

  • Mounting hole alignment

  • Frame height and width

  • Seat/armrest angle

• Ensure symmetry between left and right frames

• Check flatness of mounting surfaces

Tools: calipers, height gauge, surface plate, template jig.

• Conduct static load test (simulate seating load, e.g., 250–400 kg depending on spec)

• No cracking or deformation under rated load

• Drop or shock test (if required for public installations)

• Confirm material grade (e.g., ASTM A48 Class 25 or equivalent)

• Perform:

  • Chemical composition analysis

  • Hardness test (Brinell hardness typical for cast iron)

  • Microstructure check (if critical application)

• Check compatibility with wooden or metal slats

• Bolt hole alignment and threading condition

• Stability when assembled (no wobble)

• Salt spray test (if marine or humid environment)

• Coating thickness measurement (micron gauge)

• Ensure primer + topcoat system is compliant

• No edge chipping from transport

• Proper separation to prevent coating damage

• Protective wrapping between stacked pieces.