Drop Weight Tear Tester (DWTT) — ASTM E436 & API RP 5L3
The Drop Weight Tear Tester measures how well a ferritic steel resists brittle fracture propagation — the property that decides whether a crack in a pipeline arrests or runs. A notched specimen is broken under a controlled drop and its fracture surface assessed.
The Drop Weight Tear Tester (DWTT) is built at our Pithampur works near Indore and supplied to pipe mills, plate mills and test houses across India. It is assembled, calibrated and witness tested at the works before despatch, then set up and re-calibrated on your own foundation once it has been erected.
- Impact Energy
- 20,000J to 120,000J
- Standards
- ASTM E436, API RP 5L3, EN 10274
- Temperature Range
- -100°C to +20°C
- Built and supplied
- Made at Pithampur, Indore — delivered across India
Product Variants
- Standard DWTT: For routine drop weight tear testing operations
- High-Capacity DWTT: Enhanced impact energy for thicker materials
- Low-Temperature DWTT: Integrated cooling system for testing down to -100°C
Specifications
Key Features
- Adjustable drop height for precise energy control
- Hardened hammer and anvil (HRC 56+)
- Integrated low-temperature cooling system
- Compliant with international testing standards
Applications
- Pipeline material qualification
- Pressure vessel material testing
- Steel plate fracture toughness evaluation
- Material certification testing
Supply and Support in India
- Delivery: By road from Pithampur, with the frame, tup and anvil assembly despatched as separate lifts.
- Foundation: Impact loading and foundation drawings issued ahead of despatch, so the civil work is cured before the machine reaches site.
- Calibration: Energy, drop height and instrumentation calibrated on site, with calibration certificates issued at handover and re-calibration visits arranged from Indore.
- Standards: Configured for ASTM E436 and API RP 5L3 testing, and available for your customer’s or a third-party inspector’s witness during works testing.
- Commercial: Quoted in Indian rupees, ex-works Pithampur, with GST invoiced separately.
Frequently Asked Questions
What impact energy range does the DWTT cover?
Impact energies from 20,000 to 120,000 joules at impact velocities of 5-8 m/s, on specimens of 300×75 mm and 3-50 mm thickness, at test temperatures from -100°C to +20°C.
Why is DWTT testing required for pipeline steel?
The drop weight tear test measures a steel’s resistance to running fracture — the property that determines whether a crack in a gas pipeline arrests or propagates. Pipeline grades are routinely qualified by DWTT under API and ASTM requirements.
Is the Drop Weight Tear Tester customised to my requirement?
Yes. Every machine we build is custom-engineered — capacity, dimensions, and configuration are matched to your line. Send your requirement via the enquiry form or call +91 91091 02280 for a firm quote. Equipment is manufactured to ASTM E436, API RP 5L3, EN 10274, and test certificates are available on request.
Who calibrates the Drop Weight Tear Tester (DWTT) after it is installed?
We do. It is calibrated and witness tested at our Pithampur works before despatch, then our engineers re-calibrate energy, drop height and instrumentation on your own foundation once it has been erected. Certificates are issued at handover, and re-calibration visits are arranged from Indore.
