Quality certification is an important aspect for SIP&T, as it proves that the controlling actions in the entire production process are carried out according to standards set forth by law. It also shows the company's commitment to continuous improvement, development and increasing competitiveness on the market. ISO9001 certification is recognized worldwide.

According to EN ISO: 12100:2010 rated CE Directive(s), 2006/42/EC (Machinery) standards, HENGQ was awarded CE certification, proving that we are responsible for maintaining efficient internal production control to ensure that all products are at top quality levels, no matter where in the world they go.

This structure is specially designed for increasing the wearability on the square head. During our 10 years of manufacturing, we have not had any complaints from our customers about broken kelly bar square heads.

The protecting ring is used for anti-impact on each element of the kelly bar. Most factories use a 40 or 50mm width protecting ring, but only we use an 80mm ring.

Pressure blocks are key to interlocking kelly bars. Factories both at home and abroad use a single riveting hole pressure block in order to not reduce the kelly bar's applicability. However, we use a double riveting hole block to significantly increase the service life.

Each kelly bar is equipped with an up and down protective moving device. This device effectively prevents the bar from falling when it is lifted and pulled down.