Heavy Metal & Tubes Limited (HMTL) services

Quality is the hallmark of the business strategy of HMTL, strict adherence to the policy of `No Comparison with quality` is reflected by its stringent control over procurement of raw material, process control, streamlined distribution network & fast delivery of finished products. HMTL having Licensing & Certification to use API MONOGRAM for Casing, Tubing and Line Pipes from American Petroleum Institute (API)-USA. HMTL having certificate of Approval as well known Pipe and Tube Maker from Central Boiler Board. New Delhi.

QEHS Policy (Quality, Environmental, Health & Safety Policy): We at HMTL are determined to maintain and continually Improve Quality, Environmental, Occupational Health & Safety Management Systems to fulfill customer requirements, environmental requirements and occupational health & safety requirements.

Different types of packing methods are adopted by HMTL, depending on the customer`s need and type of product. Some of them are given in attached photographs.

Samples from each lot are tested to ensure that the hardness of the tube is within permissible limits.

This test ensures full ductility of the tubes, as well as tests the weld and the base metal strength by stretching the material to its physical endurance limit.

Flattening test mainly serves to detect microscopic internal and external flaws. It involves compressing a tubular ring between two planes parallely placed to a predetermined distance. Incipient cracks and internal or external defects which occur as result of this process are not permissible. The flattening test is conducted as described in ASTM A450 / ASTM A530 etc.

The tensile test specimen serves to determine the strength and ductility characteristics i.e. yield strength, tensile strength and elongation. Tensile tests are normally carried out at room temperature according DIN, ASTM, BS standards etc.

This test is used to detect hidden flaws, inhomogeneties, cracks etc. using the test procedure described in ASTM E-426. Tecnofour Flaw Mark detector with digital data recorder is used for testing entire length of the tubes.

All tubes and pipes produced at HMTIPL are compulsorily subjected to 100% hydro testing. Hydrostatic Testing can be carried out at pressures upto 450kg /cm sq. Customers or their deputed inspection agencies can witness 100% hydro testing at our plant. For thin wall tubes Pneumatic Testing (Air under water) is done at 300 psi max. Air pressure.

If asked by the customer, pipes are subjected to Ultrasonic testing. An acoustic transmitter probe generates a sound beam which is applied to test piece using oil as Couplant. The Ultrasonic Test Equipment is calibrated using a reference test piece with artificial test which is from the same pipe lot that is to be tested. The tested tubes are considered flawless if they do not cause any indications longer than that produce by the reference test piece. The Ultrasonic Test is conducted as described in ASTM E 213/A-450.