HONGFENG supplies API 5L line pipe, API 5CT casing and alloy seamless pipe in project quantities. Quote by grade, OD, wall thickness, length, quantity and destination, with EN 10204 3.1 MTC and inspection requirements confirmed for each order.
Everything below is quoted to your specification. If a grade or size is not listed, send the requirement — we will confirm availability and lead time the same day.
Main steam, hot reheat, feedwater and condensate lines — including ultra-supercritical units operating above 600 °C. Grade, wall thickness and heat treatment are matched to the design parameters of each line.
Furnace tubes, transfer lines, hydrogenation units and high-pressure process piping: A335 P5 / P9 / P91 / P92 and 13CrMo4-5 in long, splice-free lengths where the project requires it.
Tube and pipe for superheaters, reheaters and headers, supplied to your bill of materials with certificates that your client's third-party inspector can verify.
Prefabricated spools and modules for thermal power and waste-to-energy projects outside China — cutting and welding controlled in the workshop instead of on site.
You do not have to take our word for it — the documents travel with the goods.
Heat number recorded, PMI and spectro check against the grade ordered.
Length and bevel cut to your drawing, ends protected before handling.
Wall thickness and ovality controlled against the purchase specification.
Normalising, tempering or solution treatment to the grade requirement.
UT, RT, PT, eddy current and hydrostatic test as agreed for the order.
Grade, size and heat number marked; MTC, packing list and photos issued.
A summary only. The full range — including fittings and prefabrication tolerances — is on the specifications page.
| Product | Standard / grade | Typical size range | Main service |
|---|---|---|---|
| Alloy seamless pipe | A335 P5, P9, P11, P22, P91, P92 | OD 168.3 – 820 mm Wall to order | Main steam, hot reheat, high-pressure feedwater |
| Boiler / heat-exchanger tube | A213 T11, T22, T91, T92 | OD 25 – 168 mm | Superheater, reheater, header, heat exchanger |
| Low-temperature pipe | A333 Gr.3, Gr.6, Gr.8 | OD 21.3 – 610 mm | Cold service, low-temperature process lines |
| Large-diameter seamless pipe | A335 / A106 / A333 series | Up to OD 1420 mm | Power, chemical and high-pressure process |
| Fittings | A234 WP91/WP92, A420, A403 | DN 15 – DN 1200 | Matching the pipe grade on the same line |
| Prefabricated spools | To your isometric drawings | By drawing | Overseas thermal power and process projects |
Sizes outside this table are quoted case by case — send the drawing or the bill of materials.
Standard sizes are held in stock, stored indoors with end protection and stencilled with grade, size and heat number. Supplied to ASTM A106, ASTM A53 Type S or API 5L as required, with EN 10204 3.1 certificates.
| OD (mm) | Size | Wall thickness (mm) | Schedule |
|---|---|---|---|
| 33.4 | 1″ | 3.38 | SCH40 |
| 48.3 | 1½″ | 3.68 | SCH40 |
| 60.3 | 2″ | 3.91 / 5.54 | SCH40 / SCH80 |
| 76.0 | 76 mm (metric) | 4.00 / 5.16 | — |
| 88.9 | 3″ | 7.62 | SCH80 |
| 114.3 | 4″ | 5.00 / 6.02 / 8.56 | — / SCH40 / SCH80 |
| 141.3 | 5″ | 9.53 | SCH80 |
| 168.3 | 6″ | 7.11 / 10.97 | SCH40 / SCH80 |
| 219.1 | 8″ | 6.35 / 8.18 / 12.70 | — / SCH40 / SCH80 |
| 273.1 | 10″ | 6.35 | — |
Heavy wall in stock (6–12 m): 89 × 12 / 16 / 20 / 25 mm · 102 × 8 / 10 / 12 / 20 / 25 mm · 114 × 12 / 16 mm
Sizes not in stock are produced on short lead time — send the outside diameter × wall thickness and quantity, and we confirm availability the same day.
FOB from any suitable Chinese port, plus CFR, CIF and DAP. We can arrange vessel booking and advance ocean freight on the buyer's behalf at the carrier's actual cost.
Hexagonal or square bundles with steel strapping, plastic end caps, waterproof wrap on request, and heat-number marking on every bundle.
MTC, inspection reports, packing list, invoice, B/L, certificate of origin — issued within the agreed shipping window.
Four things: grade or standard, outside diameter, wall thickness, and quantity (pieces, metres or tonnes). If you only have the drawing or the bill of materials, send that instead — we will read the sizes from it.
There is no single minimum. Trial orders of one container are accepted so you can verify the material and packing, and project quantities are quoted with a rolling schedule.
Yes. SGS, BV, TÜV or your nominated inspector can attend testing and issue the release certificate before shipment.
Yes. Cutting to length, end beveling, threading and machining are done to your drawing, and the size and heat number are re-marked after cutting.
Standard practice is grade, size, wall thickness and heat number stencilled on each length, with a bundle tag. Your own marking or colour coding can be applied if you send the requirement.
It depends on grade, size and quantity, and is confirmed in the quotation. If your project has a fixed date, tell us at enquiry stage and we will quote against that date.
API 5L covers line pipe for transporting oil, gas or water. API 5CT covers casing and tubing used in a well. They serve different functions and must not be treated as interchangeable without engineering approval and a project specification.
Send the grade and delivery condition, outside diameter, wall thickness, length, quantity, coating, CVN temperature and energy, inspection requirements and destination. For casing or tubing, also include the connection, length range, coupling and well-service conditions.
A photograph of a handwritten list is fine. The more of the five points below you include, the faster the price comes back.