Drop Weight Tear Tester [DWTT]

Drop Weight Tear Tester [DWTT]

Increase in the demands of high operating pressures of line-pipes and larger diameters, further increase the demands of high strength steels. This drives “ADMECH“ for the development of higher strength Drop Weight Tear Tester (DWTT) that delivers for the maximum energy level of 30,000 Joules.
The Drop Weight Tear Testers measure the fracture characteristics and ductility of steel specimens according to ASTM-E436, API-RP5L3, ASTM-E208 and DIN EN 10274 standards.
Excellent results are committed with fully automatic PLC controlled DWTT with Hydraulic Shock Absorbers for drop weight tear testing of “Specimen“ according to the standards ASTM-E436, API-RP5L3, ASTM-E208 and DIN EN 10274.
We offer, four different automatic PLC controlled DWTTs;

  • ADTT-30000J
  • ADTT-55000J
  • ADTT-80000J
  • ADTT-100000J

These maintenance free DWTT machines are highly robust in construction yet smooth in operation. Moreover, the machines are supplied with optional auxiliary equipments like Hydraulic Notch Making Press and Deep Freezer to cool the specimen up to minus-(-) 80°C.
Various precautions are taken while manufacturing the machines and these are flexible enough to cater almost all the required test applications. The easy to use control software ensures consistency with quality output.

Salient Features

  • Easily removable bending tools (Hammer).
  • Modular frame design with stainless steel pillars and doors.
  • Hydraulic specimen feeding device, equipped outside of testing area.
  • Drop weigh is divided in individual weights to adjustable drop energy.
  • Four high capacity hydraulic shocks absorbs with accumulators for safe absorption of the excess drop energy.
  • Drop weight tear testing DWTT of the “Specimen“ according to standards as per ASTM-E436, API-RP5L3, ASTM-E208 and DIN EN 10274
  • Touch-screen Panel with electronic display of height, energy drop weight and dropping speed at predetermined parameters.
  • The staples adjustable drop height is reached automatically after input of drop weight and energy.

Safety

As mentioned , we have taken care of every aspect and employed all the requisite features that covers the safety issue of our machines. Some of them are as follows;

  • Electrical and mechanical safety interlocking.
  • Exclusive safety bars provided to ensure human safety in case of catastrophic failures.
  • Testing is possible only after checking of all safety parameters, to comply with OSHA requirements (USA).

Technical Specifications

Model ADTT-30000J ADTT-55000J ADTT-80000J ADTT-100000J
Maximum Impact Energy (J) 30000 55000 80000 100000
Minimum Impact Energy (J) 6500 7000 15000 15000
Maximum Height (mm) 3100 4000 5100 5100
Maximum Plate Thickness (mm) 38 50 50 50
Raising Height Accuracy (mm) ±5 ±5 ±5 ±5
Maximum Strike Weight (kg) 1000 1400 1600 1800
Strike Weight Accuracy (%) ±1 ±1 ±1 ±1
Striker Velocity (m/sec) 3.0 to 7.0 4.0 to 9.0 4.0 to 9.0 4.0 to 9.0
Specimen Alignment Accuracy (mm ±1 ±1 ±1 ±1
Base Size L x W x H (mm) 1250x1250x1250 1300x1300x200 1500x1500x200 1600x1600x300
Dimension
L(mm) 3000 3000 3500 3600
W(mm) 1300 1400 1600 1800
H(mm) 5500 7000 8500 9500
Weight (kg) 7600 10000 14500 18000

Our other equipments are as follow:

  • Pipe carriage/trolley for UT and X-ray testing of pipes.
  • Pipe rotator, Pipe conveyor, pipe transfer trolley, pipe lifting hanger and work aids.
  • Welding boom, X-ray and UT boom and post-bending rolls.
  • Pipe sizing press, online decoilers, plate flatners/levelers and hydraulic shears.
  • Cut to length lines for HR/CR coils with Edge slitters / trimmers and scrap winders.
  • Coil handling equipments I.e ‘C’ Hooks, coil brab/tong, coil upender/downender, coil car, coil transfer trolley, slab lifting tong etc.
  • DWTT Tube finning machine and finned tube heat exchangers/radiators.