Hyloc Hydrotechnic Pvt. Ltd. Offers Tube Clamps. Hyloc Hydrotechnic Pvt. Ltd. Is an ISO 9001:2008 and ISO 14001:2004 awarded company. The Tube Clamps are used in the installations to provide rigid support to the pipes both in lateral and longitudinal directions relieving stresses caused by unequal movements in the pipeline.