ASTM A106 Gr.B Pipes
ASTM A106 Gr.B pipes are seamless pipes known for their seamless construction and pressure capabilities.
ASME SA556 B2 seamless feedwater heater tubes are carbon steel tubes that are designed according to the ASME/ASTM A556/A556M specification.
ASME SA556 B2 is a specification for minimum wall thickness, seamless cold-drawn carbon steel tubes used in tubular feedwater heaters. This specification covers U-tubes made from seamless cold-drawn carbon steel, with the tubing sizes ranging from 5/8 inch to 1-1/4 inch (15.9mm to 31.8mm) outside diameter. The tubes covered by ASME SA556 B2 can be bent into the form of U-tubes, as specified.
The specification is similar to ASTM A556/A556M, which also covers seamless cold-drawn carbon steel tubes for use in tubular feedwater heaters, including bending into the form of U-tubes if specified.
ASME SA556 B2 Seamless Cold-Drawn Carbon Steel Feedwater Heater Tubes covers minimum-wall-thickness,seamless cold-drawn carbon steel tubes including bending into the form of U-tubes,, for use in tubular feedwater heaters.
Cold-drawn tubes shall be heat treated after the final cold-draw pass at a temperature of1200°F [640°C] or higher to ensure ductility satisfactory for rolling into tube sheets and to meet mechanical properties as specified.
If stress-relief anneal of the U-bends is specified, the anneal shall consist of heating the bent portion within a range of 1100 to 1200°F [585 to 640°C].
| Grade | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| SA-556M B2 | ≤0.27 | ≤0.10 | 0.29–0.93 | ≤0.035 | ≤0.035 |
| Mechanical properties | Grade B2 |
|---|---|
| Tensile strength, min, ksi [MPa] | 60 [410] |
| Yield strength, min, ksi [MPa] | 37 [260] |
| Elongation in 2 in. or 50 mm, min, % (longitudinal) | 30 |
| Hardness | HR B 79 |
When requested in the purchase order, a product analysis will be made by our from one tube or billet per heat.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
Cast basalt lined steel pipe is composed by lined with cast basalt pipe, outside steel pipe and cement mortar filling between the two layers.
Ceramic tile lined pipes have very uniform coating of specially formulated ceramic material that is affixed to the inner of the pipe.
The material of the rare earth alloy wear-resistant pipe is ZG40CrMnMoNiSiRe, which is also the grade of rare earth alloy steel.
Tubes Erosion Shields are used to protect boiler tubing from the highly erosive effects of high temperatures and pressures thereby greatly extending tube life.
The ASTM A213 T91 seamless tubes are primarily used for boiler, superheater, and heat-exchanger.
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