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The testing capabilities of Fine Tubes meet most external standards depending on individual customer specifications and product applications.

Our Testing Capabilities
Mechanical Corrosion Weld Integrity Microstructure Non-Destructive Testing (NDT)
Measurement Standards Measurement Standards Measurement Standards Measurement Standards Measurement Standards
Tensile A370 & EB, BS EN ISO 6892 Part 1 Intergranular ASTM A262 'E', BS EN ISO
3651-2, ISO 3651 Part 2 & ASTM G28 Methods 'A' & 'B'
Flatten ASTM A 1016 Metallographic ASTM E3, E407 Eddy Current (ET) ASTM E426, E309,BS EN ISO 10893 Part 2, SEP 1914 & 1915
Hardness ASTM E384, BS EN ISO 6507 Part1 Pitting ASTM G48 Method 'A', 'B', & 'C' Flange ASTM A 1016 & B751 Grain Size ASTM E112 & BS EN ISO 643 Ultrasound (UT) ASTM E213, E273,E1001 & A 1016,BS EN ISO 10893 Part 10 & SEP 1925
Contractile Strain Ratio (CSR) SAE AS 4076 Reverse Flatten ASTM A 1016 & B751 Phase Balance ASTM E1245 Radiographic (RT) BS EN1435 & ASTM E1032
Surface Roughness BS 1134, ISO 3274 & 1302 Reverse Bend ASTM 1016 & B751 Carburisation ASTM A262 'A' Magnetic Permeability Field testing to a) 35-50 nl b) relative permeability to 1.01 µr
Dimensional using 3-axis automated laser measurement Sigma Phase Detection Testing to <1% level Air -Under Water Pressure Test (AUW) Hydrostatic Pressure Test (PT) Positive Material Identification (PMI) Intrascope for bore examination

NDT Capability Summary

With full-time qualified technicians and inspectors, the Fine Tubes NDT department prides itself on its rapid response and is committed to providing complete customer satisfaction through the use of some of the most advanced NDE methods available including ultrasound and eddy current testing.


Ultrasound immersion inspection (UT) services are performed at Fine Tubes to locate discontinuities in products on the OD and ID including inconsistencies in tube wall thickness. Our high-speed automated immersion ultrasonic testing machines inspect tubing from 4mm to 60mm in diameter including wall thicknesses of between 0.25mm and 8mm. Our two-axis, five-channel ‘A’ scan immersion ultrasound systems inspect material up to 12m in length.

All of our immersion UT testing equipment is PC controlled with digital data collection and paper chart recording for file retention. Fine Tubes has an extensive collection of tube reference standards for efficient order processing with the ability to manufacture new standard requirements in-house using high-tech EDM spark erosion equipment.
With our UT 50 seven-channel rotary system the rotary head system has a maximum rotation speed of 3600rpm and allows for 100% defect detection at high speed for tubing up to 50mm diameter. This system is capable of over test on both seamless and welded products and incorporates a full dimensional scanning system for accurate OD and wall measurement.

Eddy Current Testing

Eddy current inspection is an NDT method that uses electromagnetism as the basis for conducting examinations.

Our Eddy Current Tester is a PC-based, state-of-the-art multi channel unit used for the detection of flaws, cracks, surface defects, and other production line irregularities in tubing. Various functions include tracking, analysis and multiple data logging for fast recall of all test applications. This data is collected and stored on the company’s server and can be recalled at any given time.

Sigma Detection System

Sigma phase detection is carried out by means of an eddy current system using an absolute channel with encircling coils to detect low levels of intermetallic phases. The unit is fully automated with digital acquisition stored for analysis purposes. Various size coils allow for a wide range of tube diameters. Typical levels of Sigma detection are in the region of 1%.


  • NDT technicians qualified to EN473, NAS 410, SNT - TC 1A, EN 4179 Aerospace series up to Level 3
  • Written practices to SNT – TC 1A and EN 4179
  • Full UT NADCAP approval

Research Facilities

Fine Tubes is in close association with the University of Plymouth and uses its state-of-the-art research facilities. This has enabled us to develop a knowledge database covering a wide range of applications and the experience required to deliver cutting edge microscopy data for a diverse spectrum of materials including stainless, titanium and nickel based alloys.