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Seamless steel tubes for low-temperature service

Seamless steel tubes for low-temperature service
This specification covers seamless and welded steel pipe for low temperature service.

Low temperature service seamless pipes are application for low-temperature pressure container piping by the main standard GB/T18984-2003, ASTM/ASME A/SA333 with steel grade 16MnDG, 10MnDG, A333 Gr.1, Gr.3, Gr.6

Sunny Steel offer an extensive range of Seamless steel pipes for low temperature sevice.

GB/T18984-2003 standard suitable for -49 to -148 degrees F cryogenic pressure vessel piping, and low-temperature heat exchanger tubes seamless steel pipe.

ASTM/ASME A/SA-333 Grades allow for cold temperature service to minus 150 degrees F. Material is always provided in the normalized condition at a minimum and Charpy Impact tested to a specific temperature range to assure compliance with the required service temperature.

Low Temperature Steel Pipe Specifications & Grades
Chemical Composition(%)
Grade C Si Mn P(max) S Ni Mo V
16MnDG 0.12-0.20 0.20-0.55 1.20-1.60 0.025 0.025  -  -  -
10MnDG <=0.13 0.17-0.37 <=1.35 0.025 0.025  -  - <=0.07
<=0.30  - 0.40-1.06 0.025 0.025  -  -  -
A333 Gr.3 <=0.19 0.18-0.37 0.31-0.64 0.025 0.025 3.18-3.82  - <=0.12
<=0.30 >=0.10 0.29-1.06 0.025 0.025  -  -  -
Mechanical Properties
Grade Tensile strength Lower yield strength(Rcl/Mpa) Elongation
Rm/Mpa W.T.<=16mm W.T.>16mm A/%
16MnDG 490-665 >=325 >=315 >=30
10MnDG >=400 >=240 >=35
A333 Gr.1 >=205 >=380 >=35
A333 Gr.3 >=450 >=240 >=30
A333 Gr.6 >=455 >=250 >=30

Available Sizes:
  • O.D.: from 3/4 to 20 inch
  • W.T.: 0.102 to 4inch (2.6 to 100 mm)
  • Length: max 16000mm
Marking:
  • Pipes are supplied with marking according to standard and customer request.
  • Marking is paint on the ends of pipes.
  • The same data, as well as additional information per customer’s request, is indicated on the bundle’s tags.
Delivery:
  • Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
  • Weight of bundle – up to 5000 kg upon request of customer.
  • Each bundle is furnished with three tags.


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