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Multi-rifled seamless steel tube

 Multi-rifled seamless steel tube is used as a water wall tube loaded with a highly heated flux and is also expected to find broadened other uses in the viewpoint of iits energy saving effect and higher safety against the overheating damage.

Multi-rifled seamless steel tube

This has groove on its inside surface which functions to raise thermal efficiency by distrubing the fluid within the tube, featuring and extremely high thermal conduction property.


Available grades and size range:

Multi-rifled seamless steel tube are produced to meet specific end use requirements, specifications, tolerances and chemistries.

StandardGradeSpecification
O.D.(mm)W.T.(mm)Number of rib
GB/T 20409-200620G
15CrMoG
SA-210A1
SA-210C
SA-213 T2
SA-213 T12
22-834.5-13   4-14  

 

Grade and Chemical Composition (%)
Steel GradeCSiMnSPCrMo
20G0.17-0.230.17-0.370.35-0.650.0150.025  
15CrMoG0.12-0.180.17-0.370.40-0.700.0150.0250.80-1.100.40-0.55
A 210A1
SA-210A1
≤0.27≥0.10≤0.930.0200.025  
A 210C
SA-210C
≤0.35≥0.100.29-1.060.0200.025  
A 213 T2
SA-213 T2
0.10-0.200.10-0.300.30-0.610.0200.0250.50-1.810.44-0.65
A 213 T12
SA-213 T12
≤0.15≤0.500.30-0.610.0200.0250.80-1.250.44-0.65

 

Typical Mechanical Properties

Inside the water wall pipes of boilers in sub-critical steam power plants, water boils into steam vapor.

-

GradeConditionTensile strengthYield stengthElongation
Mpa(min)Mpa(min)%(min)
1020CW4144835
SR34544810
A19333130
N23437922
1025CW4485175
SR3794838
A20736525
N24837922
4130SR58672410
A37951730
N41462120
4140SR68985510
A41455225
N62185520
Technical Specifications:
  • ASME SA192, SA209, SA210, SA213, EN 10216, DN 17175, BS 3059, JIS 3461,JIS 3462.
  • Type: Type A, Type B, and Optimized Type.
  • Manufacturing method: Cold-drawn.
  • Delivery Conditions: Normalized and Tempered.


Rifled tube

The rifled tube is used as a water wall tube loaded with a highly heated flux and is also expected to find broadened other uses in the viewpoint of its energy-saving effect and higher safety against overheating damage.

The rifled tube has a groove on its inside surface that functions to raise thermal efficiency by disturbing the fluid within the tube, featuring an extremely high thermal conduction property.


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