Weld Finishes

40-107 Hapman Standard Finish

Carbon Steel material specification:

• Low and medium carbon steel alloys.
• Sheet and plate – mill hot rolled and cold rolled finish.
• Structural shapes – mill hot rolled finish.

Carbon Steel weld specification:

• Continuous MIG or TIG weld inside and outside joints where possible.
• Free of cracks, spatter, and discoloration.
• Weld is not necessarily ripple free, flush, or blended with base metal surrounding the weld.

Stainless Steel material specification:

• 304/304L and 316/316L dual certified Stainless Steel.
• Sheet and (up to 7GA) 2B finish (PVC laser guard one side).
• Plate – mill hot rolled finish.
• Other structural shapes – mill hot rolled finish.

Stainless Steel weld specification:

• Continuous MIG or TIG weld inside & outside joints where possible.
• Free of cracks, spatter and discoloration.
• Weld is not necessarily ripple free, flush, or blended with base metal surrounding the weld.
• Light clean-up and wire brush all welds using straight edge guide.
• Other surface clean-up with min 120 abrasive, 7447 scotch-brite or similar.
• Bead blast acceptable in place of other mechanical polishing.

40-108 Hapman Food Grade

Stainless Steel material specification:

• 304/304L and 316/316L dual certified Stainless Steel.
• Sheet and tube (up to 7GA) – 2B finish (PVC laser guard one side).
• Plate – mill hot rolled finish.
• Other structural shapes – mill hot rolled finish.
• Grain direction to be indiscriminate unless otherwise noted.

Stainless Steel weld specification:

• Continuous TIG weld unless otherwise noted inside and outside joints.
• Free of cracks, spatter, scratches, heat tint and discoloration.
• Weld is not necessarily ripple free, flush, or blended with base metal surrounding the weld.
• Mechanically stripe welds to 32-63 RA finish using 120-180 abrasive, 7447 scotch-brite or similar.
• Bead blast acceptable in place of other mechanical polishing.

40-109 Hapman Sanitary Finish

Stainless Steel material specification:

• 304/304L and 316/316L dual certified stainless steel.
• Sheet and tube (up to 7GA) – #4 brushed finish. 2B exceeding #4 finish is acceptable in select areas. Other finish acceptable if subsequent polishing performed.
• Plate – polished to uniform finish.
• Structural shapes – polished to uniform finish.
• Grain direction to be indiscriminate unless otherwise noted.

Stainless Steel weld specification:

• Continuous TIG weld inside and outside joints unless otherwise noted.
• Free of cracks, spatter, scratches, heat tint and discoloration.
• When finished, all welds will be flush and blended with base metal surrounding the weld, free of crevices.
• Inside corners, the weld will be radiused & blended into base metal min of 3/16”.
• Polishing and weld finishing to 29-40 RA finish using 150-240 abrasive, 7447 scotch-brite or similar.
• Bead blast and/or electropolish acceptable in place of other mechanical polishing.
• Use dedicated stainless steel tooling to prevent cross contamination with carbon steel materials.
• Passivation of all surfaces.

40-110 Hapman Dairy Finish

Material specification:

• 304/304L and 316/316L dual certified stainless steel.
• Sheet (up to 7GA) and tube – #4 brushed finish. 2B exceeding #4 finish is acceptable in select areas. Other finish acceptable if subsequent polishing is performed.
• Plate – polished to uniform finish.
• Structural shapes – polished to uniform finish.
• Grain direction to be indiscriminate unless otherwise noted.

Finish specification:

• Continuous TIG weld inside and outside joints unless otherwise noted.
• Free of cracks, spatter, scratches, heat tint and discoloration.
• When finished, all welds will be flush and blended with base metal surrounding the weld, free of crevices.
• All contact surface angles less than 135° shall have a min 1/4″ radius except on fillet weld where one or both materials are 3/16″ thick or less, in which case radius will be not less than 1/8″.
• All internal bent angles less than 135° shall be 1/4″ radius.
• Polishing and weld finishing to ≤32 RA finish using 180-240 abrasive, 7447 scotch-brite or similar.
• Bead blast and/or electropolish acceptable in the place of other mechanical polishing.
• Use dedicated stainless steel tooling to prevent cross contamination with carbon steel materials.
• All plastic and rubber material shall comply with the applicable FDA regulation 21 CFR part 170 thru 199.
• Passivation of all surfaces.