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0102030405
Seamless Carbon Steel Pipe for High-Temperature Service - ASTM A106/A106M from China Suppliers & Factory
Ordering Information
- Quantity (length, number of pipes).
- Pipe dimensions (NPS, schedule, or wall thickness).
- Grade (A, B, or C).
- End finish (plain, beveled, threaded).
- Heat analysis requirements (if supplementary requirements apply).
- Test reports (certification to EN 10204 or similar).
- Special requirements (e.g., hydrostatic testing, non-destructive examination).
Steel Grades and Chemical Composition
| Grade | C (max) | Mn | P (max) | S (max) | Si |
|---|---|---|---|---|---|
| A | 0.25% | 0.27–0.93% | 0.035% | 0.035% | ≥0.10% |
| B | 0.30% | 0.29–1.06% | 0.035% | 0.035% | ≥0.10% |
| C | 0.35% | 0.29–1.06% | 0.035% | 0.035% | ≥0.10% |
⚙️ Mechanical Properties
Grade A
Tensile Strength: ≥48 ksi (330 MPa)
Yield Strength: ≥30 ksi (205 MPa)
Grade B
Tensile Strength: ≥60 ksi (415 MPa)
Yield Strength: ≥35 ksi (240 MPa)
Grade C
Tensile Strength: ≥70 ksi (485 MPa)
Yield Strength: ≥40 ksi (275 MPa)
Inspection & Testing Requirements
- Hydrostatic Testing: Each pipe must withstand a pressure calculated by a specified formula (unless replaced by non-destructive testing).
- Non-Destructive Examination (NDE): Optional (e.g., ultrasonic or eddy current) if agreed upon.
- Tensile and Bend Tests: One test per lot (500 pipes max) or heat.
- Flattening Test: For pipes > NPS 4 and wall thickness < 3/16 in.
- Certification: Mill test reports must comply with the standard.
Other Key Requirements
- Manufacturing Process: Pipes are made by seamless hot-working (no welding allowed).
- Heat Treatment: Cold-drawn pipes must be stress-relieved or annealed.
- Dimensions and Tolerances: Governed by ASME B36.10M (imperial) or B36.19M (metric).
- Marking: Each pipe must show manufacturer's name, grade, size, heat number, and standard number.
Supplementary Requirements (Optional)
📋 S1–S6: Additional tests (e.g., impact testing, macro-etch examination).
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❓ Frequently Asked Questions (FAQ)
Q What are the available grades for seamless steel pipes under this specification?
This specification covers three grades: Grade A, Grade B, and Grade C. Each grade differs in carbon content, manganese range, tensile strength, and yield strength, allowing customers to select the most suitable grade for their application requirements.
Q What information must be provided when placing an order?
Purchasers must specify the quantity (length and number of pipes), pipe dimensions (NPS, schedule, or wall thickness), grade (A, B, or C), end finish type, heat analysis requirements, required test reports, and any special requirements such as hydrostatic testing or non-destructive examination.
Q How are these pipes manufactured?
All pipes are manufactured using a seamless hot-working process. No welding is permitted. Cold-drawn pipes must undergo stress-relieving or annealing heat treatment to ensure proper mechanical properties and dimensional stability.
Q What testing and inspection standards apply to these pipes?
Each pipe is subject to hydrostatic testing or equivalent non-destructive examination (NDE). Tensile and bend tests are performed once per lot (up to 500 pipes) or per heat. Flattening tests apply for pipes larger than NPS 4 with wall thickness under 3/16 in. Mill test reports must comply with the applicable standard.
Q What dimensional standards govern these pipes?
Pipe dimensions and tolerances are governed by ASME B36.10M for imperial measurements and ASME B36.19M for metric measurements. Each pipe must be clearly marked with the manufacturer's name, grade, size, heat number, and the applicable standard number.
Q Are there any optional supplementary requirements available?
Yes. Supplementary requirements S1 through S6 are available upon agreement between the purchaser and the manufacturer. These may include additional tests such as impact testing and macro-etch examination, providing extra quality assurance for critical applications.