Specification for precision finished seamless cold-drawn low carbon steel tubes for use in hydraulic fluid power systems

1991 ◽  
Keyword(s):  
Carbon Steel ◽  
Power Systems ◽  
Low Carbon Steel ◽  
Fluid Power ◽  
Hydraulic Fluid ◽  
Low Carbon ◽  
Steel Tubes ◽  
Fluid Power Systems

Detection of localised flaws in small-diameter carbon steel tubes using multi-NDE techniques

2020 ◽  
Vol 62 (11) ◽  
pp. 649-655
Author(s):  
W Sharatchandra Singh ◽  
C K Mukhopadhyay
Keyword(s):  
Carbon Steel ◽  
Spatial Resolution ◽  
Small Diameter ◽  
Low Carbon Steel ◽  
Inspection System ◽  
Outer Diameter ◽  
Low Carbon ◽  
Steel Tubes ◽  
Different Types ◽  
Flux Leakage

This paper proposes multi-NDE techniques for enhanced and reliable detection of localised defects or flaws in small-diameter (19.05 mm outer diameter (OD) and 2.77 mm wall thickness (WT)) low-carbon steel tubes. Multi-NDE techniques comprising magnetic flux leakage (MFL), remote field eddy current (RFEC) and the ultrasonic internal rotary inspection system (IRIS) are used to investigate the detectability and spatial resolution for the detection of localised flaws of different types and sizes, which simulate flaws generally formed in carbon steel tubes. The studies reveal that the MFL and IRIS techniques detect 0.55 mm-deep holes and notches while the RFEC technique detects 1.11 mm-deep holes and 0.55 mm-deep notches. The IRIS technique is capable of resolving axial and circumferential holes (1 mm diameter and 1.39 mm depth) of 2 mm hole-to-hole separation, while the MFL technique can resolve axial holes of 2 mm hole-to-hole separation but not circumferential holes. The RFEC technique can detect axial holes as a single hole but is unable to detect circumferential holes, resulting in no spatial resolution for the axial and circumferential holes. Compared to the MFL and RFEC signals, IRIS readily discerns the spatial extent of the flaws with the possibility of sizing from the images. The study also reveals that the resolution capability of the IRIS technique is influenced by the speed of the turbine rotation inside the tube.

scholarly journals Stress Induced in Low Carbon Steel Tubes of Kids Bicycle Upon Impact

2019 ◽  
Vol 9 (2S4) ◽  
pp. 199-201
Keyword(s):  
Carbon Steel ◽  
Product Innovation ◽  
New Products ◽  
Low Carbon Steel ◽  
High Rate ◽  
Low Carbon ◽  
Steel Tubes ◽  
A Company ◽  
Continuous Product

The market environment is characterized by keen competition, an oversupply of goods, rapidly shifting tastes and a high rate of product innovation ad obsolescence. The long term profitability or the very survival of a company depends on new products and on commitments to continuous product innovation. Firms are seeking differential advantage and their actions continue to segment large market into smaller sub-segments. There is often a back and forth action between market reconsolidation based on innovation and fragmentation based on competition.

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