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Pipe · Electric-resistance welded

ERW Pipe

Electric-resistance-welded (ERW) steel pipe with a longitudinal seam, NPS 4" to 20", for fluid conveyance and structural use. Sizes are listed against API 5L X42 PSL1 and X52 PSL2, ASTM A53 Gr B and ASTM A500 Gr B.

  • NPS 4"–20"
  • API 5L X42 / X52
  • ASTM A53 Gr B
  • ASTM A500 Gr B
Request a quote View specifications Data sheet (PDF)
Stacked black ERW steel pipe in an outdoor yard

At a glance

Product
ERW steel pipe, longitudinal seam, continuous forming
Sizes
NPS 4" to 20" (O.D. 4.500" to 20.000", 114.3 to 508.0 mm)
Walls
0.188" to 0.500" (4.78 to 12.70 mm), depending on size
Specifications listed
API 5L X52 PSL2 · API 5L X42 PSL1 · ASTM A53 Gr B · ASTM A500 Gr B (by size; see table)
Tolerances
Published as precise on roundness, straightness and wall thickness
Special sizes
On request

Finishing and testing options

The mill we represent publishes these services. Ask which apply to your order:

  • Mechanical bevelling
  • Hydrostatic testing
  • Ultrasonic testing
  • Real-time X-ray (fluoroscopy) inspection
  • Varnish
  • Interior and exterior coatings
Conveyance or structural? Pipe made to a structural specification (ASTM A500) isn’t intended for carrying fluids. For conveyance, specify a line-pipe or conveyance specification such as API 5L or ASTM A53.
Electric-resistance welded pipe

ERW pipe for conveyance and structural use

NPS 4" to 20", listed to API 5L X42 PSL1 / X52 PSL2, ASTM A53 Gr B and ASTM A500 Gr B by size.

Request a quote View specifications

Steel pipe laid along a pipeline route · Photo: Peter Facey · CC BY-SA 2.0

Technical data

Specifications

Wall thickness, schedule and theoretical mass for every published size, with the specifications listed for each.

ERW pipe sizes and specifications listed
Wall (in) Wall (mm) Schedule kg/m API 5L X52 PSL2 API 5L X42 PSL1 ASTM A53 Gr B ASTM A500 Gr B
NPS 4" · O.D. 4.500 in (114.3 mm)
0.188 4.78 — 12.896 ● ● ● ●
0.237 6.02 STD · Sch 40 16.072 ● ● ● ●
0.250 6.35 — 16.902 ● ● ● ●
NPS 6" · O.D. 6.625 in (168.3 mm)
0.188 4.78 — 19.251 ● ● ● ●
0.219 5.56 — 22.317 ● ● ● ●
0.237 6.02 — 24.083 ● ● ● ●
0.250 6.35 — 25.353 ● ● ● ●
0.280 7.11 STD · Sch 40 28.261 ● ● ● ●
NPS 8" · O.D. 8.625 in (219.1 mm)
0.188 4.78 — 25.232 ● ● ● ●
0.219 5.56 — 29.285 ● ● ● ●
0.237 6.02 — 31.624 ● ● ● ●
0.250 6.35 Sch 20 33.307 ● ● ● ●
0.277 7.04 Sch 30 36.785 ● ● ● ●
0.322 8.18 STD · Sch 40 42.530 ● ● ● ●
0.375 9.53 — 49.214 – – – ●
0.500 12.70 — 64.625 – – – ●
NPS 10" · O.D. 10.750 in (273.1 mm)
0.219 5.56 — 36.688 ● ● ● ●
0.250 6.35 Sch 20 41.757 ● ● ● ●
0.307 7.80 Sch 30 51.000 ● ● ● ●
0.365 9.27 STD · Sch 40 60.298 ● ● ● ●
0.375 9.53 — 61.891 – – – ●
0.500 12.70 Sch 60 81.526 – – – ●
NPS 12" · O.D. 12.750 in (323.9 mm)
0.219 5.56 — 43.655 ● ● ● ●
0.250 6.35 Sch 20 49.711 ● ● ● ●
0.312 7.92 — 61.732 ● ● ● ●
0.375 9.53 STD 73.821 ● ● ● ●
0.406 10.31 Sch 40 79.724 ● ● ● ●
0.500 12.70 XS 97.434 – ● ● ●
NPS 14" · O.D. 14.000 in (355.6 mm)
0.219 5.56 — 48.010 – ● ● ●
0.250 6.35 Sch 10 54.682 – ● ● ●
0.312 7.92 Sch 20 67.936 – ● ● ●
0.375 9.53 Sch 30 81.278 – ● ● ●
0.500 12.70 XS 107.375 – ● ● ●
NPS 16" · O.D. 16.000 in (406.4 mm)
0.219 5.56 — 54.977 – ● ● ●
0.250 6.35 Sch 10 62.636 – ● ● ●
0.312 7.92 Sch 20 77.862 – ● ● ●
0.375 9.53 STD · Sch 30 93.209 – ● ● ●
0.500 12.70 XS · Sch 40 123.284 – ● ● ●
NPS 18" · O.D. 18.000 in (457.2 mm)
0.250 6.35 Sch 10 70.590 – ● ● ●
0.375 9.53 STD 105.139 – ● ● ●
0.500 12.70 XS 139.192 – ● ● ●
NPS 20" · O.D. 20.000 in (508.0 mm)
0.250 6.35 — 78.544 – ● ● ●
0.375 9.53 STD · Sch 20 117.070 – ● ● ●
0.500 12.70 XS · Sch 30 155.099 – ● ● ●

● = listed for that size and specification on the published table; – = not listed. Masses are theoretical, as published. Special sizes on request.

Specifications as published by the mill we represent (accessed October 2026). The mill’s current data and your written quote prevail. Final selection is the responsibility of your engineer or specifier.

Applications

Where ERW pipe is used

  • Pipe welding on site
    Pipe installationPipe welding on site · Photo: Fumikas Sagisavas · CC0
  • Large-diameter steel pipe
    Conveyance linesLarge-diameter steel pipe · Photo: Magnolia677 · CC BY 4.0
  • Large-diameter steel pipe
    Pipe on siteLarge-diameter steel pipe · Photo: FBenjr123 · CC BY-SA 4.0

Hydrocarbon conveyance

Sizes listed to API 5L X52 PSL2 and X42 PSL1 line-pipe specifications.

Water and hydraulic conveyance

Sizes listed to ASTM A53 Gr B.

Structural use

Sizes listed to ASTM A500 Gr B for structural applications.

Application photos are illustrative and don’t show Tas & Zaz projects or customers.

Mill representatives

Quoted by the mill, handled locally

Your request goes to the Mexican mill we represent. Its written quote comes to you through Tas & Zaz, your local contact in Canada and the USA.

Request a quote Data sheet (PDF)

Hot rolling in a steel mill · Photo: Adrian Tync · CC BY-SA 4.0

Downloads

Technical documents

Request a ERW pipe quote

Give the NPS, wall or schedule, specification, lengths, end finish, quantity, destination and required-by date.

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Photo credits

Other product photos: images published by the mills and manufacturers we represent, or from the current Tas & Zaz website. All photos are illustrative and do not show Tas & Zaz facilities, projects or customers.