SS Pipe Size Chart in mm – Download PDF Guide 2025 | Udhhyog India

 

Whether you're involved in plumbing, industrial fabrication, structural work, or process piping, knowing the exact SS pipe size in mm is critical for performance, accuracy, and cost optimization. In this complete guide from Udhhyog, we offer a detailed SS pipe size chart in millimeters, explain sizing terminology, and provide a free PDF download to assist engineers, fabricators, and buyers in 2025.



🛠️ Why Accurate SS Pipe Sizing Matters

Using the right stainless steel pipe size ensures:

  • ✅ Correct flow rate and pressure performance

  • ✅ Proper fitting compatibility

  • ✅ Avoidance of material waste

  • ✅ Compliance with ASTM and IS standards

At Udhhyog, we supply a full range of SS pipes with verified dimensions, test certificates, and custom finishing options.

🔍 Understanding SS Pipe Sizing Terminology

TermExplanation
NB (Nominal Bore)Refers to the internal bore of the pipe
OD (Outer Diameter)External diameter in mm or inches
Wall ThicknessThickness of the pipe wall in mm
Schedule (SCH)Indicates wall thickness vs. pressure rating

Pipes are often ordered using the NB and Schedule (e.g., 40, 80), but in practice, millimeter-based sizing (OD × Thickness) is used for precise engineering.

📦 Udhhyog SS Pipe Size Range in mm

NB (mm)OD (mm)Common Wall Thicknesses (mm)Schedule Equiv.
1521.341.6, 2.0, 2.5SCH 5S, 10S
2026.671.6, 2.0, 2.8SCH 10S, 40S
2533.402.0, 2.5, 3.4SCH 10S, 40S
3242.162.5, 3.0, 4.0SCH 10S, 40S
4048.262.5, 3.2, 4.0, 5.0SCH 40S, 80S
5060.332.9, 3.6, 5.5SCH 40S, 80S
6573.033.2, 4.0, 6.0SCH 40S, 80S
8088.903.2, 4.5, 6.5SCH 40S, 80S
100114.303.6, 4.5, 7.0SCH 40S, 80S
150168.285.0, 6.0, 10.0SCH 40S, 80S, 160
200219.086.0, 8.0, 12.7SCH 40S, 160
250273.056.4, 9.0, 14.3SCH 40, 80, 160
300323.857.1, 10.3, 17.0SCH 40, 80, 160

📥 Click below to download the full size chart in PDF format

👉 Download Udhhyog SS Pipe Size Chart in mm – PDF 2025
(We can replace this with an actual link if needed)

🏭 Stainless Steel Pipe Grades at Udhhyog

We supply stainless steel pipes in various grades including:

GradeApplication
SS 202Furniture, railing, light structures
SS 304Plumbing, food, dairy, water supply
SS 316Marine, chemical, pharmaceuticals
SS 310High-temperature steam, exhaust systems

All pipes are available in ERW, seamless, polished, and custom finish variants.

🧾 Standards Followed at Udhhyog

StandardDetails
ASTM A312Seamless & Welded SS Pipes
ASME B36.19MStainless Steel Pipe Dimensions
IS 1239 / IS 3589Indian Standards for piping
ASTM A554Decorative & structural pipe usage

We provide Mill Test Certificates (MTC) and third-party inspection support for all orders.

💰 Udhhyog SS Pipe Price Overview (2025 Rates)

SizeScheduleGradeApprox Price (₹/kg)
25mm ODSCH 10SSS 304₹225 – ₹245
50mm ODSCH 40SSS 304₹240 – ₹260
80mm ODSCH 80SS 316₹295 – ₹320
100mm ODSCH 40SS 202₹190 – ₹210

📞 Contact Udhhyog for your project-specific pricing and bulk discount quotes.

📐 Finishing Options for SS Pipes

  • 🔹 Mill Finish

  • 🔹 Mirror Finish

  • 🔹 Matte Finish

  • 🔹 Pickled & Passivated

  • 🔹 Polished (180 to 600 grit)

🔧 Common Applications for SS Pipes

SectorUse Case
PlumbingWater pipelines, hot/cold water systems
Food & BeverageDairy piping, CIP systems, water lines
ConstructionRailing, staircases, structural columns
Chemical IndustryAcid-resistant and corrosion-proof lines
Pharma & BiotechSterile and cleanroom piping
Oil & GasProcess, refinery, and pressure pipelines

🚚 Why Udhhyog is India’s Trusted SS Pipe Supplier

  • ✅ PAN India delivery from Delhi, Ahmedabad & Mumbai

  • ✅ Ready stock in ½" to 16" pipes (OD in mm)

  • ✅ Cut-to-length & packaging available

  • ✅ B2B support with compliance, certificates, and inspections

  • ✅ GST billing, freight assistance & dispatch updates

🧾 Documents You’ll Receive with Every Udhhyog Order

  • ✅ GST Invoice

  • ✅ Mill Test Certificate (MTC)

  • ✅ Packing List

  • ✅ Custom Inspection (on demand)

🛒 How to Order from Udhhyog

  1. 📩 Share your size, schedule, grade & location

  2. 📃 Receive official quotation with GST invoice

  3. 📦 Confirm order & choose logistics mode

  4. 🛻 Delivery within 3–7 days across India

📣 Download the PDF Now – SS Pipe Size Chart in mm

Get a quick-access reference chart in PDF format for workshop, site use, and procurement teams.

📥 Download Now – Udhhyog SS Pipe Size Chart in mm (2025 Edition)
(Insert actual link or provide via email/WhatsApp)

📚 FAQs – SS Pipe Size Chart in mm (2025)

❓1. What is the difference between NB and OD in SS pipes?

NB (Nominal Bore) is a rounded reference to the internal diameter, while OD (Outer Diameter) is the actual outside measurement in mm.

❓2. Are SS pipe sizes in mm and inches the same?

No. Inches are commonly used in naming (e.g., 1” = 25.4mm), but technical dimensions are always calculated in mm.

❓3. Can I get SS pipes in custom wall thicknesses?

Yes. Udhhyog offers custom thicknesses for SCH 5, 10, 40, 80, and 160 depending on your requirement.

❓4. Is this size chart valid for both welded and seamless pipes?

Yes. The OD and wall thickness are the same. The only difference is in manufacturing method and application suitability.

❓5. How do I know which size to choose for my project?

Contact Udhhyog with your application details (fluid, pressure, length, environment). We’ll suggest the best grade and size.

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