Seamless and welded line pipe for wholesale & pipeline orders
We supply API 5L carbon steel line pipe from China for planned pipeline and wholesale purchases. The selections below cover Grade B across seamless and welded routes, plus grade-specific X52 and X65 LSAW rows. Each quote keeps grade, PSL, route and dimensions together.
We quote line pipe to the approved grade, PSL and manufacturing route. Tie-in pieces and mixed distributor orders retain their own dimensions, finished lengths and batch references.
For gathering and transmission lines, the project specification sets the steel grade, wall and accepted pipe-making process. Seamless and longitudinally welded pipe serve different size schedules; spiral-welded pipe adds larger-diameter selections where the project permits it. Our quotation follows that approved material scope.
A tie-in purchase may need only a few sizes but still has to match the specified grade, wall and weld preparation. Distributor orders often combine several sizes for separate customers. Keeping each line's PSL, length and finish visible prevents a similar-looking pipe from being treated as an interchangeable item.
| Item | Supply Range |
|---|---|
| Product | Carbon steel line pipe to the ordered API 5L specification |
| Manufacturing routes | Seamless (SMLS), ERW/HFW, LSAW and SSAW |
| Grade choices | Grade B selections for all four routes below; X52 and X65 LSAW selections; other combinations by separate inquiry |
| Product specification level | PSL 1 or PSL 2, as specified in the purchase requisition |
| Seamless selections below | 60.3 × 7.1, 88.9 × 7.6 and 101.6 × 8.1 mm OD × wall |
| ERW selections below | 60.3 × 3.9, 88.9 × 5.5 and 114.3 × 4.8 mm OD × wall |
| SAW selections below | SSAW: 219.1, 323.9 and 508 mm OD; LSAW: 16, 20 and 24 in. catalog OD |
| Length options | 6 m, 12 m or a specified custom length |
| Pipe ends | Plain or beveled ends; preparation stated with the order |
| External finish | Bare or black finish; FBE, 3PE or 3PP coating subject to pipe and project specification |
| Inspection documents | Material and test records tied to the ordered grade, PSL and heat or batch |
| Purchase basis | API 5L edition, project additions and acceptance documents listed in the order |
Each row links route, grade, OD and wall. The purchase line adds PSL, delivery condition and project additions; the table gives dimensions, not operating-pressure ratings.
Seamless and ERW inch values are actual ODs retained from the catalogs. SSAW inch values are metric conversions rounded to three decimals. LSAW retains the catalog's rounded metric values alongside its inch ODs; exact contract dimensions are specified before production. Wall values are nominal millimeters.
Swipe left to see all columns.
| Route | Grade | OD (mm) | OD (in.) | Wall (mm) |
|---|---|---|---|---|
| SMLS | B | 60.3 | 2.375 | 7.1 |
| SMLS | B | 88.9 | 3.500 | 7.6 |
| SMLS | B | 101.6 | 4.000 | 8.1 |
| ERW/HFW | B | 60.3 | 2.375 | 3.9 |
| ERW/HFW | B | 88.9 | 3.500 | 5.5 |
| ERW/HFW | B | 114.3 | 4.500 | 4.8 |
| SSAW | B | 219.1 | 8.626 | 6.0 |
| SSAW | B | 323.9 | 12.752 | 8.0 |
| SSAW | B | 508.0 | 20.000 | 10.0 |
| LSAW | B | 406 | 16 | 6.0–14.0 |
| LSAW | X52 | 508 | 20 | 6.0–14.0 |
| LSAW | X65 | 610 | 24 | 6.0–14.5 |
Additional catalog sizes are available through the route-specific pages below. Keep actual OD and wall together when comparing an inch-based pipe schedule with a metric quotation.
Factory catalog references
Seamless pipe catalog (PDF, pp. 7–10) ERW pipe catalog (PDF, pp. 5–8) SAW pipe catalog (PDF, pp. 2 & 5)
For seamless carbon pipe beyond this line-pipe selection, see Seamless Carbon Steel Pipe.
Plain or beveled ends and the specified coating can be included with the pipe. We price the end work, coating and weld cutbacks as separate items.
Plain ends are available for shop preparation. Beveled ends follow the weld drawing, with checks of the bevel, root face and finished end condition.
FBE, three-layer polyethylene and three-layer polypropylene are different coating specifications. The order identifies the system, required thickness, end cutback and acceptance tests. Bare or black-finish supply remains an option when coating will be applied elsewhere.
Inspection and records follow the specified edition, grade, PSL and project additions. Material, pipe-test and coating reports identify the delivered lot.
The manufacturing record identifies whether the pipe is seamless, HFW, longitudinal SAW or spiral SAW. Heat or batch references connect the material with its test records and final identification. On a mixed-size order, those references remain distinct even when the pipes share the same grade.
OD, wall, length and ends are checked against their ordered tolerances. Pressure and applicable nondestructive test records identify the method and acceptance basis, allowing the purchaser to distinguish manufacturing acceptance from the pipeline design pressure.
The material record states the grade and the required test results for its heat or batch, including any project-specific acceptance limits.
Weld and pipe-body examination use the method and coverage required for the manufacturing route, PSL and purchase specification.
Purchaser or third-party inspection points are agreed before production so the relevant operation can be presented for acceptance at the required stage.
The final document list links material certificates and required inspection records to the pipe identification and packing list. Coating reports form a separate part of the package when coated pipe is ordered.
Smaller pipe can be grouped in strapped bundles, while larger coated lengths need suitable individual support and restraint. Packing separates sizes and grades and protects the ordered ends. Coated surfaces also need contact points that avoid direct steel-on-steel rubbing.
The packing list records the supplied sizes, lengths and quantities with the relevant bundle or pipe references. Fixed lengths and any agreed length distribution stay visible so receiving staff can reconcile the shipment with the purchase schedule.
The delivery schedule depends on the selected route, quantity, coating and inspection stages. Witness points and coating acceptance can affect the release date. Our quotation states the production and shipment basis for the complete order.
The quote separates pipe, beveling, coating, additional inspection and export packing. The delivery term and named destination identify the freight included.
Sour-service purchases add their specified material, HIC/SSC testing and acceptance conditions to the pipe order. Those requirements need to match the proposed grade and route; PSL 2 alone does not define the sour-service package.
Use the edition required by the project and record it on the purchase order. API published the 47th edition on June 2, 2026. Publication of a new edition does not by itself verify a particular mill's qualification or Monogram license; those documents must match the order's acceptance requirements.
No. Each route has its own grade-and-wall selection and inspection requirements. The project specification must accept the proposed manufacturing route before it replaces another item on the pipe schedule.
A shared Grade B designation does not make the specifications interchangeable. API 5L includes seamless and welded line pipe; ASTM A106 is a seamless carbon steel pipe specification. A substitution needs project approval, and any dual-certified purchase needs records demonstrating compliance with both ordered specifications.
Yes. Sizes and grades are priced separately with their quantities and preparation. Each line shows any production minimum, while the shipment can combine the identified material lots.
Attach the pipe schedule with quantity and destination. If the schedule already includes grade, PSL, route and coating, a short project note is enough; we use the attached list to prepare the itemized offer.