ASTM A106 Grade B Seamless Pipe Carbon Steel — Factory Direct Supplier | Huaxia-Steel

ASTM A106 Grade B seamless pipe is the industry-standard carbon steel pipe for high-temperature and pressure service in refineries, power plants, and process piping systems. Huaxia-Steel supplies A106 Gr.B seamless pipe from NPS 1/8″ to 24″, schedules 10 through 160 and XXS, with full EN 10204 3.1 certification, hydrostatic test records, and third-party inspection welcome. All material is fully killed, fine-grain practice, with silicon minimum 0.10% per specification.

Product Overview

A106 Gr.B is manufactured by the seamless hot-rolling or hot-extrusion process: a solid round billet is pierced and rolled over a mandrel, producing a pipe with no weld seam — essential for sustained creep strength and code-listed service at elevated temperature. The specification covers pipe for high-temperature service with minimum yield of 240 MPa and minimum tensile of 415 MPa. Every length is marked with the manufacturer’s name, spec, grade, size, schedule, and heat number for full traceability to the mill certificate.

Specifications

Parameter	Standard / Range
Standard	ASTM A106 / ASME SA106 Grade B (seamless)
Size Range	NPS 1/8″ – 24″ (DN6 – DN600)
Schedules	Sch 10, 20, 40/STD, 80/XS, 120, 160, XXS
Min Yield Strength	240 MPa (35 ksi)
Min Tensile Strength	415 MPa (60 ksi)
Chemistry (C / Mn / P / S / Si)	0.30 max / 0.29–1.06 / 0.035 max / 0.035 max / 0.10 min
Wall Tolerance	±12.5% (seamless)
Ends	Plain, beveled (ASME B16.25), or threaded per order
Surface	Black bare, varnished, or hot-dip galvanized on request

Dimensions (Selected Common Sizes, Sch 40)

NPS	OD (mm)	Wall (mm)	Weight (kg/m)
1″	33.4	3.38	2.50
2″	60.3	3.91	5.44
4″	114.3	6.02	16.07
6″	168.3	7.11	28.26
8″	219.1	8.18	42.55
12″	323.9	10.31	79.73

Available Grades

• Grade A: 205 MPa min yield — for lower-strength requirements
• Grade B: 240 MPa min yield — the standard workhorse grade
• Grade C: 275 MPa min yield — for higher-strength service
• Dual-certified A106 Gr.B / A53 Gr.B S available on request

Manufacturing Standards

• ASTM A106/ASME SA106 — Seamless Carbon Steel Pipe for High-Temperature Service
• ASME B36.10M — Welded and Seamless Wrought Steel Pipe dimensions
• ASME B31.1 / B31.3 — Power and Process Piping code compliance
• API 5L interchange for suitable line-pipe cross-orders

Applications

• Refinery process piping per ASME B31.3
• Boiler feed lines, steam headers, superheater connections
• Power plant high-temperature water and steam service
• Petrochemical heat exchanger and furnace piping
• Compressed air and hydraulic header systems

Quality Assurance

Each heat is hydrostatically tested (1000 psi or 2/3 yield, whichever greater, unless NDE substitution applies) and supplied with EN 10204 3.1 mill certificates covering chemistry, tensile results, heat treatment, and heat-number traceability. Non-destructive examination (UT or EDDY current) is available per supplementary requirement S-series clauses. Third-party inspection by SGS, BV, or TÜV is welcome before shipment, including witness hydrotest, dimensional sampling, and marking verification. PMI spot checks and wall-thickness ultrasonic audits are offered on request.

Packing and Shipping

Pipe is supplied in hexagonal bundles (small bore) or loose lengths (12″ and above), steel-banded with end protectors on beveled ends. Standard lengths 6 m and 12 m; random length and cut-to-length available. Varnish, black paint, or 3LPE anti-corrosion coating can be applied for ocean transit. Each bundle carries a stenciled tag with heat numbers and a packing list cross-referenced to the mill certificates.