Schedule 10 and Schedule 40 steel pipe for wholesale fire protection supply
Black, red-coated and galvanized sprinkler pipe can be supplied with cutting and prepared ends for fabrication. Compare NPS 1–8 Schedule 10 and 40 dimensions below; listed-pipe orders use the specific pipe configuration and its approval submittal.
| Material | Carbon steel; electric resistance welded (ERW) |
|---|---|
| Pipe specifications | ASTM A795, A135 or A53, as specified on the order |
| Wall options | Schedule 10 and Schedule 40 |
| Finishes | Black, red paint, red epoxy or hot-dip galvanized |
| Lengths | 5.8 m, 6 m and 12 m; cut lengths to order |
| Pipe ends | Plain or roll-grooved; threaded ends on Schedule 40 |
| Companion products | Grooved couplings, elbows, tees and fire protection valves |
Compare Schedule 10 and Schedule 40 at the same nominal pipe size.
| NPS (in.) | OD (in. / mm) | Sch 10 wall (in. / mm) | Sch 40 wall (in. / mm) |
|---|---|---|---|
| 1 | 1.315 / 33.4 | 0.109 / 2.77 | 0.133 / 3.38 |
| 1-1/4 | 1.660 / 42.2 | 0.109 / 2.77 | 0.140 / 3.56 |
| 1-1/2 | 1.900 / 48.3 | 0.109 / 2.77 | 0.145 / 3.68 |
| 2 | 2.375 / 60.3 | 0.109 / 2.77 | 0.154 / 3.91 |
| 2-1/2 | 2.875 / 73.0 | 0.120 / 3.05 | 0.203 / 5.16 |
| 3 | 3.500 / 88.9 | 0.120 / 3.05 | 0.216 / 5.49 |
| 4 | 4.500 / 114.3 | 0.120 / 3.05 | 0.237 / 6.02 |
| 5 | 5.563 / 141.3 | 0.134 / 3.40 | 0.258 / 6.55 |
| 6 | 6.625 / 168.3 | 0.134 / 3.40 | 0.280 / 7.11 |
| 8 | 8.625 / 219.1 | 0.148 / 3.76 | 0.322 / 8.18 |
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Nominal pipe-schedule reference dimensions. At NPS 4, both schedules have a 4.500 in. OD; Schedule 10 has a 0.120 in. wall and Schedule 40 has a 0.237 in. wall.
A rolled groove forms the coupling seat without cutting material from the wall. Schedule 10 is supplied with roll-grooved or plain ends for the joint arrangement on the approved pipe schedule.
Schedule 40 provides the wall used for conventional threaded fire-pipe connections. NPT ends are available for US threaded fittings; the order identifies the thread form and any coupling requirements.
Plain-end lengths are available for shop fabrication, with square cuts or the specified weld bevels. Finished pieces retain the end detail required by the next operation.
The groove must match the coupling system, including the gasket seat and groove diameter. We prepare ends to the ordered groove specification and keep different groove systems separate in packing.
Cut grooves are reviewed with the pipe wall and approved joint specification. Light-wall rolled-groove orders retain their specified end process.
Grooved couplings, elbows and tees can ship with the pipe. Fittings are listed by size, connection system and piece count, so the pipe footage and fitting quantities remain separate.
Compare the matching grooved coupling kits, elbows and tees by actual pipe OD and connection profile.
Black pipe retains a dark steel surface and suits orders that call for an ungalvanized product. The quotation identifies any mill-applied protective coating separately from a project paint system.
Red paint gives the external pipework a consistent identification color. Our finishing scope states the paint system and exterior coverage; the color alone does not identify a pressure class or approval.
Epoxy is ordered as a coating system with a specified thickness and coverage. Pipe ends, gasket seats and touch-up requirements are included in the coating instructions.
The zinc coating covers the steel surface specified on the order. Galvanized pipe is supplied where the approved project specification calls for it, with the required end preparation and coating records.
The material schedule identifies ASTM A795, A135 or A53 together with the grade, size and wall. We keep that specification on the quotation, mill records and pipe identification so the ordered material remains traceable.
Our offer for a listed-pipe order identifies the manufacturing site and the UL or FM record covering its size, schedule and product configuration. The corresponding submittal is supplied with that offer for review before acceptance; ordinary pipe dimensions are not offered as approval evidence.
The approved system design sets the working pressure. Pipe dimensions, joint type and the selected coupling or fitting rating must all support that design; a mill hydrostatic test pressure is not a system working-pressure rating.
Measurements identify the ordered NPS and wall schedule. At NPS 6, the nominal wall is 3.40 mm for Schedule 10 and 7.11 mm for Schedule 40, a difference that must remain clear on bundle labels.
Our factory inspection covers the welded seam, hydrostatic testing and flattening tests under the ordered pipe specification. Test records stay linked to the production lot.
End checks cover the groove profile or thread form, visible damage and burrs at the bore. The prepared end must match the connection specified on the order.
Surface checks cover coating coverage and handling damage. Pipe identification and bundle counts are checked against the packing list before release.
Our quotation separates NPS, schedule, finished length, finish and end preparation. Per-length and per-foot prices use the same finished-length basis, with processing and companion fittings identified alongside the pipe.
Schedule 10 and Schedule 40 bundles are identified individually, even when the outside diameter is the same. Painted surfaces are separated during handling, and prepared ends receive protection against impact damage.
The packing list records pieces per bundle and total lengths by item. Batch quantities, production dates and shipment terms are stated on the quotation for your destination, including mixed-size orders.
Yes. Both schedules can be included on one purchase order. They remain separate line items and bundles, with their own sizes, lengths and finish requirements.
Yes. We quote finished cut lengths from your list, including the end preparation required on each end. The cutting allowance, finished-length tolerance and piece count are agreed before production.
Pipe size, wall schedule, coating, end preparation and the number of production batches determine the order minimum and production slot. Your quotation states the quantity and timing for each item.
Yes. Sample requirements are agreed by size, wall, finish and prepared end. Inspection of a sample establishes the product details to be used for the bulk order; shipment inspection remains part of the agreed order scope.
The quote identifies the pipe and companion fittings separately. Couplings, elbows and tees have their own size, connection system and piece counts alongside the pipe lengths.
Send the pipe sizes, schedules, finished lengths and quantities, together with the finish, connection system and delivery destination. We will return an itemized factory quotation.