Grade 30 Proof Coil
Also referred to as Proof Chain, Grade 28, System 3 and Grade 3
Grade 30 Proof Coil IS NOT RATED for OVERHEAD LIFTING by OSHA .
Welded Link Chain
Grade 30 Proof Coil Markings
Grade 30 can be marked 28, 3, 30 or simply have no markings at all. There may be a letter before the number (like D3 or D30) which is usually a manufacturer’s ID code. G30 chain is made from Low Carbon Steel (except for stainless steel).
Grade 30 Proof Coil Surface Finishes
Self Colored – also known as SC (for self colored; the chain’s manufacturing process is complete after it gets welded), Shot Peened (a shot blast cleaning technique used by the manufacturers after the welding process), BP (for bright polished; a cleaning technique used by the manufacturers using a tumbler after the welding process)
Zinc Plated – otherwise known as ZP, EG or Electro Galvanized which provides a modest rustproofing but is shiny and is great for retail
Hot Dip Galvanized – otherwise known as HDG or Hot Galvanized and provides the best rust proof coating of the three
Powder Coated – yellow and black are stocked here at Advantage; between 3/16-3/8
Powder Coated – shown in yellow
Stainless Steel Proof Coil – While technically unfinished, it is a highly corrosion resistant material. Available in Type 304 or Type 316. Stainless steel is a material, not a finish.
Grade 30 Proof Coil Common Uses
Trailer Chains
Lock Chains
Crowd Control
General use that is not critical in nature or for OHL
Stainless Steel Proof Coil Common Uses
Commonly used in wastewater, chemical, nuclear, marine and other corrosive environments. Also commonly used at amusement parks for crowd control.