Order at a Glance
| Package | Four pipe lines, seamless and longitudinal welded mixed |
| Destination | Brazil |
| Heaviest line | API 5L Gr B PSL1, 16" × 0.375" (STD/Sch30), 960 m in 80 joints of 12 m, 3PE 3.2 mm |
| Total quantity | 1,409 m · ≈ 108.9 t |
| Coating | Triple-layer polyethylene 3.2 mm, certified to ABNT NBR 15221 |
| Heat treatment | P91 normalized and tempered, hardness verified batch by batch |
| Ends | Plain end (P91 line) and butt-weld ends to ASME B16.25 (carbon lines) |
| Certificate | EN 10204 3.1 mill certificates, heat-number traceable |
| Status | Confirmed; production released per line schedule |
Order Specification
| No. | Product | Standard | Size | Length | kg/m | Weight |
|---|---|---|---|---|---|---|
| 1 | Alloy steel pipe, seamless | ASTM A335 Gr P91 | 1.5" (1.9" OD) × 0.281" (Sch160), plain end | 36 m | 7.24 | 261 kg |
| 2 | Longitudinal welded pipe, 3PE coated | API 5L Gr B, PSL1 | 16" (406.4 mm OD) × 0.375" (STD/Sch30), BW ends to B16.25, 12,000 mm lengths | 960 m | 93.22 | 89,492 kg |
| 3 | Carbon steel pipe, seamless | ASTM A106 Gr B | 12" (323.85 mm OD) × 0.250" (Sch20), BW ends to B16.25 | 215 m | 49.72 | 10,689 kg |
| 4 | Carbon steel pipe, seamless, dual-standard | API 5L Gr B / A106 Gr B | 6" (168.28 mm OD) × 0.432" (XS/Sch80), BW ends to B16.25 | 33 joints ≈ 198 m | 42.57 | 8,428 kg |
| Package, total | - | 108,870 kg | ||||
The P91 Line Sets the Pace
36 m sounds like the smallest line, and it decides the delivery schedule. 1.5" wall 0.281" (Sch160) on a 1.9" outside diameter is a heavy wall on a small bore - the diameter-to-wall ratio sits below 7, and the mill schedules it with heavy-wall seamless lots rather than pulling it from stock. P91 is a tempered-martensitic 9Cr steel that leaves the works normalized and tempered, and its weldability at the site depends entirely on the mill holding the delivered hardness inside the specified band. Hardness is therefore verified batch by batch, and the temper record travels with the mill certificate - a weld procedure qualified against out-of-band hardness is wasted at the weld. The 36 m line runs to the P91 lot schedule; the other three lines follow carbon-steel timing.
Inspection and Certification
Seamless lines shipped with EN 10204 3.1 mill certificates and heat-number traceability, with hydrostatic testing or non-destructive electric testing per the governing standard. The P91 line carried temper and hardness records alongside the certificate, per batch. The coated line added the coating acceptance file: test-plate reports to ABNT NBR 15221 for adhesion, peel and thickness, plus holiday detection at the coating works, with cutback length recorded against the agreed field procedure. Dimensions were checked on finished pipe - outside diameter, wall and straightness over the 12 m joints - and bevels and end faces were protected so the coated joints reached site ready to weld.
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What does the 3PE system on the 16" line cover?
Three layers at 3.2 mm nominal - fusion-bonded epoxy, adhesive and polyethylene - certified to ABNT NBR 15221. Test-plate reports for adhesion, peel and thickness are issued against that standard, holiday detection is done at the coating works, and the cutback at the bare weld ends is agreed with the field welding procedure before coating starts.
Why certify the coating to ABNT NBR 15221 instead of ISO?
The buyer's inspection basis is the Brazilian standard. The three layers are the same, but a report issued to ISO 21809 does not automatically satisfy an order written to a national book - the coating works runs test plates and issues reports against the standard the order names, which keeps the shipment out of document review at destination.
Why does the 12" A106 line order Sch20?
Sch20 at 0.250" is the design wall for that service. It sits below the STD stock schedule, so it is produced to order - 215 m fits one production lot. Substituting Sch30 adds nearly 50% to the line weight and moves the design numbers the pipe was sized against, so the wall is not a substitution decision.
Can one pipe carry both API 5L Gr B and A106 Gr B?
Yes - the same seamless Gr B pipe can ship under either nameplate, because the chemistry and strength overlap. What changes is the book: an API 5L certificate states PSL level and manufacturing process, while an A106 certificate does not carry PSL. The purchase order names the governing standard so the inspector audits against the right document.
What documentation comes with the package?
EN 10204 3.1 mill certificates with heat numbers for all four lines; temper and hardness records on the P91 line; coating test-plate reports and holiday-detection records on the 3PE line; and dimensional reports on the finished pipe. Third-party inspection to 3.2 can be added where the purchase order requires it.
Quoting a Mixed Seamless and Welded Pipe Package?
Send the line list as it looks on your side - standard and grade, OD, wall, length or joint count, ends, and any coating standard by name. Tell us the certificate level and whether coating reports must follow a national standard, and we will quote line by line with the producible-size check included, within 24 hours.
