Steam Supply Jacking Concrete Lined Ductile Iron Pipe Environmental Friendly

QA and QC for Jacking for Small Diameters

In the same way as the jacking method for medium to large diameter, controls for progress, material and equipment, work, safety and pollution are highlighted for QA and QC for small diameters jacking. Small diameter jacking have some specific problems such as: impossible jacking, zigzag line, pipe break, surface settling, groundwater inflow, damage to other utility lines. Man-entry is not possible for small diameters. So the excavation face cannot be checked directly visually. Furthermore, even in case of emergency, human operation is impossible in the tunnel. For this reason, it is expensive to control the emerging situation. Therefore, QA and QC requires special attention.

HENAN WEIN INDUSTRY CO.,LTD. is located in the famous commercial and historical city—Zhengzhou, and its registered capital is RMB 5,000,000 Yuan.WEIN is a joint-stock company, which focuses on ductile iron pipes & fittings both in domestic and overseas market.

Our company offers high-quality pipes and fitttings, and services for potable water and sewage water. The main products are from DN80mm to DN2600mm, 250,000 tons per year and conform to ISO2531, BSEN545,  BSEN14901, BSEN15189, BSEN15655, ISO4179 and ISO8179 international standards and have attained ISO9001:2000 certificate.

Our products are widely used in water projects in China and selling well in the Middle East and Africa and southeat Asia etc,  have received customers' extensive welcome and favorable comments.

Your satisfaction is our direction!