Quality

It is policy to
1) Satisfy our customers' needs and expectations
2) Make commitments we fully understand and believe we can meet
3) Meet all commitments to customers on time

DM Special Steel Ltd continually improves the effectiveness of the quality management system (QMS) and sets quality objectives and work plans. Moreover, DM Special Steel Ltd is committed to upgrade the capabilities of its technical and administrative staff through formal training and continuous technical quality awareness. We have achieved the high quality through the professional competence of the personnel, high working motivation and a service minded attitude. Every single employee of DM Special Steel Ltd is responsible for the quality of his/her work.

All DM Special Steel Ltd products are tested in accordance to internationally recognized standards or our own more stringent internal test procedures, which is developed considering the harsh field conditions. In addition to this we also offer specific testing to our client's requirement.

RAW MATERIAL TESTING
All the material used for Manufacturing of fittings and other fabrication jobs are tested for chemical & mechanical properties. The Results are confirmed to meet original material requirement before processing. We are using measuring equipments calibrated by Govt. approved calibration Agencies.

DIMENSIONAL INSPECTION
All type of Flanges and fittings are checked for dimensional accuracy from raw material stage to in process & final product delivery by using calibrated measuring instruments.

MATERIAL TRACEABILITY
All the material used for Manufacturing of fittings, valves and other fabrication jobs are identified & fully traceable from raw material stage to final product.

Incoming Raw Material

Sr. No. Process Description Ref. Documents Standards Characteristic to be checked Samples quorum of size/inspection Instrument equipment used for testing Acceptance criteria
1 S. S. Coils / Seamless Pipe (Mother Hollow) Purchase Order / Specifications • Dimension
• T.C. Verification
(Lab test Report) (if required)
• Packing Condition
• Weight
• Defects if any
Sample / Heat Vernier, Micrometer, Chemical, Analysis, Tensile Testing Machine (Brinell Rockwell) Hardness Testing Machine 100% confirmation to Specifications

IN HOUSE TESTING OPTION:

HYDRO TEST UP TO 15000 PSI
All type of Fittings & valves are tested at a specified static pressure for a predetermined period for no leakage.

SOME SPECIAL TEST ON REQUEST OF CLINTS:

PNEUMATIC/GAS TEST
ALL COMPRESSORE AND THREADED FITTINGS and valves are subjected to Pneumatic test at 150psi air pressure and 2000psi Nitrogen pressure. Pneumatic/Gas test is carried out after hydro testing and complete drying of the items following Hydro-Test.

Helium Gas Test (HG-TEST) can be offered on request:

PRESSURE CYCLE TEST
All fittings and valves are tested for pressure cycle test where pressure surges from Opsi to 5000psi. The test is conducted at the rate of 25 to 45 cycles per minute with the digital counter. Client can specify number of cycles and condition of test.

TEMPRATURE TEST ON REQEUST
fittings and valves are heated to temperature upto 350oC for one complete cycle of 4 hours. After that valves are again subjected to Hydro, Pneumatic and Pressure cyclic test for no leakage. All the above test are certified by our own Quality control department and can be witnessed by client or third party inspection company of client's choice.

VIBRATION TEST
fittings and valves are tested for severe vibration under impulse pressure for no leakage

Stage wise Inspection

Sr. No. Process Description Ref. Documents Standards Characteristic to be checked Samples quorum of size/inspection Instrument equipment used for testing Acceptance criteria
2 I) Welded Tube forming & Welding
II) Seamless Cold Drawing
As per Work order/ Specification Dimensions check Diameter (Ovality) x Length x Thickness
• Weight
• Defects if any
3 Samples from each Coil 1 Sample from each lot Universal testing
machine UIN 40 - T
Make "UTS"
Microscope, Vernier,
Micrometer & Measuring Tape
Dimensions acceptance as per order, Confirmation to standard samples as per details
3 Annealing Temperature as per ASTM Standards • Temperature
• Hardness
• Cooling
• Water Quenching
1 Sample per lot / 1 Sample per heat Digital Graphic, Temperature Recorder, Digital Temperature Indicator & Temperature Controller, Metallurgical Microscope, Brine Rockwell Hardness Tester  
4 Straightening Straightening as per specification Check straightening of Pipes & Tubes First 2 pipes of each size lot Roller Straightening Machine, Micrometer, Visual Observation Straightening as per specification & standard sample
5 End Facing / Squaring & Beveling Burr-Free Squaring / Beveling with Proper V-Shape 100% Visual inspection Abrasive Polishing as per standard sample Confirmation to specifications / requirements Straightening as per specifications
6 Hydrostatic Testing As per ASTM standard Leakages 100% Hydraulic Pressure Tester No Leakage
7 Picking As per required ASTM standard • Scale removing inside
• outside surface area
100% Visual Observation Confirm to requirement
8 Final Inspection Physical / Chemical Testing As per applicable standard Visual Dimension, Physical & Chemical 100% (or) as per ASTM standard Micrometer, Vernier, Universal Testing Machine, Molly Detector & Caron sampling at Random Spectra / Wet Method Confirmation to requirements
9 Marking (as per) customer requirement /
standard marking
As per requirement • Spell check
• Verification of Details
100% Confirm on first two sample & continue Inkjet machine / Electro Etching co-relation of heat no size Grade, etc. with Test Certificate Confirm to requirement
10 Packing & Delivery As per customer requirement Packing quality Tightness of packing 100% confirm to requirement and release for Box Crate, Polythene, Hessian Cloth Packing according to customer requirements

 

Factory Tour

API Pipe Factory-DM Special Steel Ltd

API Pipe Production

API Pipe Factory-DM Special Steel Ltd

Pipe Production

API Pipe Factory-DM Special Steel Ltd

Pipe Production

API Pipe Factory-DM Special Steel Ltd

Pipe Production

API Pipe Factory-DM Special Steel Ltd

Pipe Production

API Pipe Factory-DM Special Steel Ltd

Production Factory

API Pipe Factory-DM Special Steel Ltd

Pipe Production

API Pipe Factory-DM Special Steel Ltd

Pipe Production

API Pipe Factory-DM Special Steel Ltd

Production Factory