Wide Diameter & Wall-Thickness Range
Product formPipes
/ 01 — TECHNICAL OVERVIEW
Stainless Steel & High Nickel Alloy Welded Pipes
Manufacturer, Supplier & Exporter of dependable welded pipe for process, utility and industrial service.
NESCO Pipe & Tubes supplies welded stainless steel and duplex pipes for process, utility and general industrial piping systems where a broad size range and dimensional flexibility are needed alongside proven material performance. Welded pipe is manufactured from strip or plate: the material is formed into a cylindrical shape and joined along a longitudinal seam using a qualified welding procedure, after which the pipe is heat treated, sized, straightened and inspected to the requirements of the governing specification.
Welded construction allows a wider practical range of diameters and wall thicknesses than seamless production, and is generally more cost-efficient for large-diameter and thin-to-medium wall requirements. Because the longitudinal seam is a defined, inspectable feature, it can be radiographically or ultrasonically examined along its full length, giving purchasers a documented, traceable quality record for the weld itself, in addition to the parent material certification.
Industries choose welded pipe from NESCO Pipe & Tubes because it combines a wide grade and size range with documented weld inspection, dimensional consistency and mill certification support. NESCO reviews each welded pipe enquiry against material grade, standard, size, wall thickness, length, end preparation and testing requirement, and can coordinate third-party inspection where the project calls for it — making welded pipe a dependable, cost-effective option across structural, utility and process applications.
How it is made
01
Material is verified, levelled and prepared to the required width for the ordered size.
02
Strip or plate is progressively formed into a cylindrical shape.
03
The seam is closed by the qualified welding process applicable to the ordered specification.
04
Post-weld heat treatment, sizing and straightening are completed as the specification requires.
05
The seam and pipe body receive the specified visual, dimensional, hydrostatic and NDT examinations.
Request reviewed quotation Material documents on request
/ 02 — PRODUCT DETAIL
Built around the specification.
Key characteristics and commonly referenced standards from the supplied technical content master.
Key features01 02 03 04 05 06 07 08
Cost-Efficient for Large Orders
Inspectable Longitudinal Seam
Good Corrosion Resistance
Suitable for Structural & Process Duty
Available in Multiple Surface Finishes
Fast Lead Times on Common Sizes
Wide Material Availability
Common specification references
STD
ASTM A312, A358, A778 and A790 material specifications, where applicable
STD
ASME B36.19M dimensional specification
STD
Qualified ERW or EFW manufacturing routes
STD
Project-specific seam examination requirements
Explore the pipes range
/ 03 — MATERIAL RANGE
Grades matched to the service.
Commonly requested families are shown below. Availability is confirmed against the complete specification.
Material familyAvailable materials and grades
Stainless SteelTP304, TP304L, TP316, TP316L, TP310S, TP317L, TP321, TP347, TP347H and TP904L
Duplex Stainless SteelUNS S31803 and UNS S32205 (2205)
Super Duplex Stainless SteelUNS S32750 (2507) and UNS S32760
Nickel AlloysAlloy 20, Alloy 28, Alloy 200, Alloy 201, Monel 400, Inconel 600, Inconel 601, Inconel 625, Inconel 718, Incoloy 800, Incoloy 800H, Incoloy 800HT, Incoloy 825, Hastelloy C276 and Hastelloy C22
TitaniumGrade 2 and Grade 5
Cupro NickelCuNi 90/10 (C70600) and CuNi 70/30 (C71500)
/ 04 — SUPPLY & CUSTOMISATION
Define the supply condition.
Final availability depends on the complete combination of material, dimensions, standard, condition, testing and quantity.
ParameterTypical information to specify
01Product Standard
ASTM A312 / A358 / A778 / A790, as applicable; ASME B36.19M (dimensions)
02Manufacturing Type
Welded — longitudinal seam (ERW or EFW route as applicable to size)
03Size Range
1/2" NPS to 48" NPS (project sizes on enquiry)
04Wall Thickness
Schedule 5S to Schedule XXS
05Length
Single Random, Double Random, or Fixed Cut Length
06Ends
Plain End (PE); Bevelled End (BE); Threaded on request
07Surface Finish
Pickled & Passivated (standard); Bright Annealed or Polished on request
08Marking
Standard mill marking
09Packaging
Export-worthy bundling, end protection and crating
/ 05 — DIMENSIONS & SIZE RANGE
Dimensions aligned to the manufacturing route.
Representative welded-pipe size range. A complete chart can be requested through the product enquiry form.
NPSOD (mm)Wall thickness (mm) — Sch 10S/40SSchedule
4"114.33.05 / 6.0210S / 40S
8"219.13.76 / 8.1810S / 40S
12"323.94.57 / 9.5310S / 40S
16"406.44.78 / 9.5310S / 40S
24"610.06.35 / 9.5310S / 40S
36"914.47.92 / 9.53 (project-confirmed)10S / project
/ 06 — MANUFACTURING STANDARDS
Standards aligned for every order.
The material standard, dimensional standard and project requirements should be stated separately.
Material standards
StandardWhat it covers
ASTM A312 / A312MWelded austenitic stainless steel pipe, where applicable
ASTM A358 / A358MElectric-fusion-welded austenitic stainless steel pipe, where applicable
ASTM A778 / A778MWelded unannealed austenitic stainless steel pipe, where applicable
ASTM A790 / A790MWelded ferritic-austenitic (duplex) stainless steel pipe
ASTM B517Inconel 600 welded pipe
ASTM B705Inconel 625 welded pipe
ASTM B514Welded nickel-iron-chromium alloy pipe; applicability confirmed against the ordered grade
ASTM B862Titanium and titanium-alloy welded pipe
ASTM B467 / B467MCu-Ni welded pipe
Dimensional standards
StandardWhat it covers
ASME B36.10MWrought steel pipe dimensions
ASME B36.19MStainless steel pipe dimensions
European standards
StandardWhat it covers
EN 10217-7Welded stainless steel pipe for pressure purposes
/ 06 — REFERENCE MATERIAL DATA
Reference material data.
Representative values for frequently requested stainless grades. Values are percentages by mass or minimum mechanical requirements unless shown otherwise; always verify the ordered material standard, product form and edition.
Chemical compositionSelected principal elements · % max or range
GradeCCrNiMoOther
304≤0.0818.0–20.08.0–11.0—Mn ≤2.0, Si ≤1.0
304L≤0.03518.0–20.08.0–13.0—Mn ≤2.0, Si ≤1.0
316≤0.0816.0–18.010.0–14.02.0–3.0Mn ≤2.0, Si ≤1.0
316L≤0.03516.0–18.010.0–14.02.0–3.0Mn ≤2.0, Si ≤1.0
310S≤0.0824.0–26.019.0–22.0—Mn ≤2.0, Si ≤1.5
317L≤0.03518.0–20.011.0–15.03.0–4.0Mn ≤2.0, Si ≤1.0
321≤0.0817.0–19.09.0–12.0—Ti: 5×C min–0.70
347≤0.0817.0–19.09.0–13.0—Nb+Ta: 10×C min–1.00
347H0.04–0.1017.0–20.09.0–13.0—Nb+Ta: 8×C min–1.00
904L≤0.0219.0–23.023.0–28.04.0–5.0Cu: 1.0–2.0
2205 (Duplex)≤0.0322.0–23.04.5–6.53.0–3.5N: 0.14–0.20
2507 (Super Duplex)≤0.0324.0–26.06.0–8.03.0–5.0N: 0.24–0.32
Inconel 625≤0.1020.0–23.0Balance (≥58)8.0–10.0Nb+Ta: 3.15–4.15
Incoloy 825≤0.0519.5–23.538.0–46.02.5–3.5Cu: 1.5–3.0
Hastelloy C276≤0.0114.5–16.5Balance (≥57)15.0–17.0W: 3.0–4.5, Fe: 4.0–7.0
Mechanical propertiesRoom-temperature minimums · verify the ordered product standard
GradeTensile strength (MPa, min)Yield strength (MPa, min)Elongation (%, min)Density (g/cm³)Melting range (°C)
304515205358.001400–1450
304L485170358.001400–1450
316515205358.001375–1400
316L485170358.001375–1400
310S515205357.981400–1450
317L485170358.001375–1400
321515205358.001400–1425
347515205358.031400–1425
347H515205358.031400–1425
904L490220358.001320–1390
2205 (Duplex)620450257.801350–1400
2507 (Super Duplex)795550157.801350
Inconel 625827414308.441290–1350
Incoloy 825586241308.141370–1400
Hastelloy C276690283408.891325–1370
/ 07 — INSPECTION & TESTING
Evidence before dispatch.
PMI (Positive Material Identification)
Confirms alloy chemistry matches the ordered grade.
Hydro Test
Hydrostatic pressure test to the specified test pressure and hold time.
UT (Ultrasonic Testing)
Detects internal discontinuities without damaging the pipe.
ET (Eddy Current Testing)
Nondestructive electric examination for surface and near-surface discontinuities, where specified.
RT (Radiographic Testing)
X-ray/gamma examination of welds or wall for internal defects.
IGC Test
Intergranular corrosion test (e.g. ASTM A262) for weld-sensitised austenitic grades.
Flattening Test
Confirms product ductility by flattening a representative sample section.
Flaring Test
Confirms end-forming ductility where required by the ordered product specification.
Hardness Test
Verifies hardness is within the limit specified for the grade/condition.
Third-Party Inspection
Witnessing/certification by agencies such as BV, SGS, TUV or Lloyd's.
EN 10204 3.1 Certification
Mill test certificate validated by the manufacturer's own inspection department.
PACKAGING & MARKING
Protected and traceable.
01Bundle Packing
02Wooden Boxes
03Export Crates
04Plastic End Caps
05Waterproof Wrapping
06Heat Number Identification
07Barcode (Optional)
/ 08 — APPLICATIONS & INDUSTRIES
Engineered for demanding service environments.
From process plants to marine systems, NESCO coordinates material, dimensions and documentation around the operating conditions of each application.
01
Oil & Gas02
Petrochemical
03
Chemical Processing04
Refineries
05
Power Plants
06
Heat Exchangers
07
Marine08
Offshore09
Water Treatment10
Desalination
11
Pharmaceutical12
Food Processing13
Sugar Industry14
Pulp & Paper15
Fertilizer Plants16
General EngineeringIndustries servedOne supply partner across critical sectors.
EPC ContractorsOEMsFabricatorsHeat Exchanger ManufacturersBoiler ManufacturersShipbuildingInfrastructure ProjectsProcess Plants
/ 09 — WHY NESCO PIPE & TUBES
Built for buyers who cannot leave details to chance.
From specification review to export documentation, NESCO coordinates the technical and commercial details as one complete supply requirement.
01
Wide Product Portfolio
Pipes, tubes, flanges, fittings, bars, sheets/plates and fasteners from one supplier.
02
Multi-Material Supply
Stainless, duplex, super duplex, nickel alloy, titanium and copper-nickel under one enquiry.
03
Mill Test Certificates
EN 10204 3.1 as standard, 3.2 with third-party witness where applicable.
04
Third-Party Inspection Support
Coordination with BV, SGS, TUV, Lloyd's and other agencies on request.
05
Reliable Sourcing
Established mill and stockist relationships for consistent availability.
06
Fast RFQ Response
Enquiries reviewed against the complete technical requirement, not just price.
07
Project Supply Expertise
Experience handling project packages alongside routine maintenance orders.
08
Export Documentation Support
Assistance with the paperwork needed for international shipment.
09
Custom Cutting & End Preparation
Subject to size, grade and quantity availability.
10
One-Stop Solution
A single point of contact for industrial piping product requirements.
/ 10 — FREQUENTLY ASKED QUESTIONS
Clear answers before you specify.
Quick guidance on product selection, standards, dimensions, inspection and documentation. For project-specific requirements, NESCO will review the complete enquiry with your team.
01What is the difference between Seamless and Welded pipes?
Seamless pipe is pierced from a solid billet and has no weld seam, giving uniform strength in all directions; welded pipe is formed from strip/plate and joined along a longitudinal seam, which allows a wider size range at a generally lower cost.
02When is EFW pipe used instead of standard Welded pipe?
EFW pipe is used when the required diameter or wall thickness exceeds what standard coil-fed welded production can practically achieve — typically large process headers and heavy-wall pressure piping, where the pipe is rolled from individual plate rather than coil.
03Which grade should I select?
Grade selection depends on the fluid handled, chloride content, pressure, temperature, fabrication method and the applicable project or code requirement. NESCO can quote the grade requested; final material selection remains with the project engineer.
04Do you provide EN 10204 3.1 certificates?
Yes, EN 10204 3.1 mill test certificates are provided as standard; 3.2 certificates with third-party witnessing can be arranged on request.
05Can you supply cut lengths?
Cut lengths are available subject to grade, size, quantity and manufacturing route — include the required length and tolerance in your enquiry.
06What standards do you follow?
Primarily ASTM/ASME material and dimensional standards, with EN equivalents available where specified. See the Manufacturing Standards section for the full list.
07Do you export internationally?
Yes, export packing and shipping documentation support are part of NESCO's standard service.
08Can third-party inspection be arranged?
Yes, inspection through agencies such as BV, SGS, TUV or Lloyd's can be coordinated when stated in the purchase order.
09What is the minimum order quantity?
This depends on the grade, size and whether the item is ex-stock or made-to-order; please share your requirement for a specific answer.
10Do you stock all grades?
Common grades are typically held ex-stock; less common alloys, large sizes and EFW pipe are generally sourced from the mill on a made-to-order basis.
11How can I request a quotation?
Use the Request for Quotation form on this page, or send your specification, drawing or bill of materials by email.
12What end preparations are available?
Plain end is standard on seamless and welded pipe; bevelled ends to ASME B16.25 (or the project WPS for EFW) and threaded ends are available subject to size and specification.
13Can NESCO supply Positive Material Identification (PMI) reports?
Yes, PMI testing can be arranged and reported alongside the mill test certificate when requested at enquiry stage.
/ 11 — REQUEST FOR QUOTATION Nesco direct sales desk
Ready to source?Start with the details you already have.
Our team will review the grade, dimensions, testing and delivery requirements together.