Thai Boiler and Power Plant Contractor Buys ASTM A106B Seamless Tube for Steam Piping
Publié le: October 20, 2026
Thai Boiler and Power Plant Contractor Buys ASTM A106B Seamless Tube for Steam Piping
A boiler and power plant services contractor in Rayong, Thailand, has purchased ASTM A106 Grade B hot rolled seamless carbon steel tube for high-temperature steam piping on industrial boiler retrofits and biomass power plant maintenance work. The material replaced a mixed supply of welded pipe that had been causing fit-up and inspection delays.
Client Background
The client provides boiler erection, pressure-part replacement and steam distribution piping for petrochemical plants, biomass power stations and food processing factories along Thailand's eastern industrial belt. Its fabrication shop prefabricates steam headers, downcomers and distribution spools that must comply with pressure equipment inspection requirements.
The Challenge
- Steam service at elevated temperature required material rated for high-temperature duty
- Previous welded pipe supply produced ovality and wall variation that slowed fit-up
- Radiographic inspection failures on welded pipe seams increased rework and cost
- Frequent small-batch orders across several diameters needed short, dependable lead times
- Pressure part documentation had to satisfy the client's authorised inspector
- Pipes had to arrive clean, with protected ends, ready for immediate fabrication
The Solution
We supplied hot rolled seamless tube to ASTM A106 Grade B in 2" to 16" sizes with wall thickness from 3.5 mm to 25 mm, cut to 6 m and 12 m lengths matched to the client's spool drawings. Because the material is seamless, there is no longitudinal weld seam to interfere with radiographic interpretation, which helped the shop reduce repair rates on steam line welds.
Consistent outside diameter and roundness improved pipe-to-fitting alignment, cutting fit-up labour on each spool. Ends were bevelled and capped for transport, surfaces were protected with anti-corrosion oil, and every bundle shipped with material test reports and ISO and BV certification for the authorised inspector's review.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product | ASTM A106B Hot Rolled Seamless Tube — steam service |
| Standard | ASTM A106 / A106M Grade B |
| Type / Shape | Seamless, round |
| Size Range | 2" – 16" (60.3 mm – 406.4 mm OD) |
| Wall Thickness | 3.5 mm – 25 mm |
| Length | 6 m / 12 m, or as per customer's requirement |
| Service | High-temperature steam, boiler and heat exchanger piping |
| Pipe End | Bevelled, plain, or threaded with coupling and cap |
| Surface | Anti-corrosion oil / black painting / varnish |
| Certificate | ISO, BV, with material test reports |
| ODM / OEM | Available |
| Application | Boilers, steam headers, heat exchangers, process piping |
Results & Benefits
- Seamless construction removed weld-seam indications from radiography, lowering repair rates.
- Improved roundness and diameter consistency cut fit-up time per spool.
- High-temperature capability matched boiler and steam header design conditions.
- Cut-to-length supply reduced offcut waste in the fabrication shop.
- Complete documentation satisfied the authorised inspector at first review.
- Predictable lead times supported the contractor's maintenance shutdown schedule.
Conclusion
ASTM A106B hot rolled seamless tube gives boiler and power plant contractors a dependable, inspection-friendly material for high-temperature steam service. By switching from welded pipe to seamless supply, this Thai contractor improved weld quality, shortened fabrication cycles and kept shutdown schedules on track.
