Flange Dimensions Chart — Class 1500 & 2500

Dimension Standards & Tolerances

Dimensions in this chart conform to the applicable international and Indian standards. Understanding which standard governs your requirement is essential for correct specification: ASME B36.10 — carbon and alloy steel pipe dimensions. ASME B36.19 — stainless steel pipe dimensions. ASME B16.5 — flanges NPS 1/2 to 24. ASME B16.9 — buttweld fittings. ASME B16.11 — forged fittings. ASME B16.47 — large flanges NPS 26 to 60. IS 808 — Indian structural steel sections. IS 1239 — ERW steel tubes. IS 2062 — structural steel plates.

Standard tolerances for pipes: OD tolerance ±1% for sizes above 4 inch, ±0.4mm for smaller sizes. Wall thickness tolerance +12.5%/-0% (seamless), +12.5%/-12.5% (welded). Length tolerance: +50mm/-0mm for fixed lengths. Ovality (difference between max and min OD) must be within limits specified by the standard. Straightness deviation maximum 0.2% of total length. Always verify received material dimensions against these tolerances using calibrated measuring instruments.

Complete Dimension Table

The table below covers all standard sizes per the applicable specification. Dimensions shown include: Nominal Size (NB/NPS), Outside Diameter (OD in mm), Wall Thickness for each schedule/class (in mm), and Weight per metre (in kg/m). For structural sections: depth, width, web thickness, flange thickness, weight per metre, and section properties (moment of inertia, section modulus, radius of gyration). These reference values are essential for structural design calculations and material ordering.

Creative Metal Industries maintains ready stock of commonly demanded sizes (highlighted in the full chart). Non-standard sizes can be procured on indent from approved mills within 2-4 weeks. Minimum order quantities for indent: typically 500 kg to 2 tonnes depending on product and mill. For standard stock sizes, there is no minimum quantity — we supply even single pieces for urgent maintenance requirements.

How to Specify Correctly

When ordering based on this chart, specify the complete description: Product form (pipe, tube, plate, angle, channel, etc.). Standard (ASTM A312, A106, IS 1239, IS 808, etc.). Grade (TP304L, Gr.B, P91, E250, etc.). Size — NPS x Schedule for pipes (e.g., 4 inch NPS x SCH 40S). Or OD x WT for tubes (e.g., 25.4mm OD x 1.5mm WT). Or dimension for sections (e.g., ISMC 200 x 75). Length — random (5-7m), fixed (specify length), or cut-to-length. End finish — plain end (PE), beveled end (BE), threaded, grooved. Quantity — metres, pieces, or kg/tonnes.

Common ordering mistakes to avoid: specifying NB when you mean OD (NB 2 inch = OD 60.3mm, not 50.8mm). Confusing Schedule 40 with Schedule 40S (different wall thickness for sizes above 10 inch). Not specifying the L-grade for welded applications (304 vs 304L). Forgetting to mention end finish requirement. Ordering structural steel by weight but expecting exact number of pieces. CMI's experienced sales team catches these common errors and confirms correct specifications before dispatch — preventing costly returns and project delays.

Source All Sizes from CMI Vadodara

Creative Metal Industries stocks the complete size range from this chart across multiple grades and materials. Our Vadodara warehouse at GIDC Makarpura maintains 2000+ tonnes of inventory covering: SS pipes and tubes (1/2 inch to 24 inch, all schedules). CS pipes (1/2 inch to 48 inch, ERW and seamless). Alloy steel pipes (P91, P22, P11 — 1 inch to 12 inch). Duplex and exotic alloy (1/2 inch to 8 inch commonly stocked). Structural steel (full range of IS 808 sections). Plates (SS, CS, alloy, boiler quality — 6mm to 100mm).

For any size in this chart — whether from stock or indent — contact us: Phone: +91 99982 80619 (Sunny Shah). WhatsApp: same number for photos and immediate response. Email: creativemetalind@gmail.com. We provide formal quotations within 4 hours with complete specification confirmation, delivery timeline, and documentation scope. Our goal is to be your single-source supplier for all industrial metal requirements.

Other Products from Creative Metal Industries

Beyond the subject of this article, Creative Metal Industries stocks a comprehensive range of industrial metals: Stainless Steel pipes, plates, sheets, fittings and flanges in grades 304, 316L, 321, 310, 904L. Carbon Steel seamless and ERW pipes per ASTM A106, A53, IS 1239, API 5L. Alloy Steel pipes P91, P22, P11 with IBR certification. Duplex & Super Duplex 2205/2507 pipes, plates, and fittings. Exotic Alloys including Inconel 625/600, Hastelloy C276, Monel 400, Titanium Grade 2/5, and Copper Nickel 70/30. Structural Steel TMT bars, MS angle, channel, beam, plate, and flat bar.

Related Articles & Resources

• MS Structural Steel Guide
• Mill Test Certificate Guide
• Exotic Alloy Guide

Frequently Asked Questions