Asansol is the heart of West Bengal's coal, steel and railway belt in Paschim Bardhaman, anchored by the IISCO Steel Plant at Burnpur, Eastern Coalfields operations and thermal power plants. We manufacture and electropolish SS 304L and 316L pipes and tubes and supply the clean-utility, DM-water, sampling and laboratory lines of these plants, with MTC EN 10204 3.1, 100% PMI testing and a measured Ra report on every order.
Asansol is the principal commercial and industrial hub of Paschim Bardhaman, forming the western anchor of the Durgapur–Raniganj–Asansol industrial corridor. The city is anchored by the historic IISCO Steel Plant (SAIL) at Burnpur, extensive coal operations under Eastern Coalfields Limited (ECL), thermal and captive power generation, railway workshops, and secondary metallurgical clusters at Jamuria, Kulti and Raniganj.
A word on fit. Main process piping in coal mining, steel making, and heavy engineering relies on carbon steel and heavy alloy piping. Electropolished stainless steel pipe is specifically utilised on clean-utility circuits: demineralised (DM) water loops, boiler-water and steam-chemistry sampling stations, analytical instrumentation, laboratory gas lines, and skid assemblies.
| Zone / MIDC | Typical End-Use | Application | Our Usual Spec |
|---|---|---|---|
| IISCO Steel Plant (SAIL) & Burnpur Works | Integrated steel production and rolling | DM-water, sampling, instrument and laboratory lines; not main process service | 316L / 304L, small-bore, cut to drawing |
| Eastern Coalfields & Raniganj Industrial Belt | Coal mining, engineering workshops, coal-based chemicals | Clean utility, DM water, workshop testing assemblies | 304L / 316L |
| Jamuria and Kulti Industrial Areas | Sponge iron, foundries, rolling mills and engineering | Clean utility, skid assemblies, wash lines | 304L / 316L, cut to drawing |
| Thermal Power and Captive Power Stations | Power generation and steam utility | DM-water, boiler-chemistry and water-analysis sampling lines | 316L / 304L |
| Paschim Bardhaman Equipment Builders & Fabricators | Machinery and process equipment fabrication | Headers, skids, clean-side piping, cut to drawing | 304L / 316L, traceable cut lengths |
Smooth, passivated 304L and 316L for demineralised-water and pure-water utility circuits.
Small-bore stainless tube cut to drawing for high-precision water analysis and instrument monitoring.
Clean, documented tubing for in-plant metallurgical, environmental and analytical labs.
Cut lengths and fittings supplied against scheduled blast-furnace or power-unit overhaul windows.
Cut-to-length pipe with heat-number traceability for contractors serving public-sector and private plants.
Quotes against project drawings and specifications at design stage with complete commissioning documentation.
| Grade | UNS | WNR (EN) | Typical Process Use |
|---|---|---|---|
| SS 316L | S31603 | 1.4404 | Pharma, biotech, WFI loops, chloride or aggressive cleaning chemicals |
| SS 304L | S30403 | 1.4307 | Dairy, food, beverage, winery, general hygienic & utility lines |
| Duplex 2205 | S31803 / S32205 | 1.4462 | High yield strength, extreme chloride resistance, chemical & coastal duty |
| Super Duplex | S32750 / S32760 | 1.4410 / 1.4501 | High-pressure aggressive acids, offshore, harsh petrochemical streams |
| Service | Typical Industry Band | Ra µin (exact) | Sakshi Forge Offer |
|---|---|---|---|
| Pharma / biotech | Ra ≤0.25 to ≤0.4 µm | 9.8 to 15.7 µin | Standard: ≤0.4 µm (ASME BPE SF4) |
| Dairy / food / beverage | Ra ≤0.6 to ≤0.8 µm | 23.6 to 31.5 µin | Within standard offer (≤0.4 µm) |
| Semiconductor / UHP | Ra ≤0.13 to ≤0.25 µm | 5.1 to 9.8 µin | Available on custom drawing spec |
Weight (kg/m) = (OD − WT) × WT × K, where K = 0.02491 (304/304L, 7.93 g/cm³), 0.02507 (316/316L, 7.98 g/cm³) and 0.02450 (Duplex 2205, 7.80 g/cm³).
| Nominal Size | OD (mm) | WT (mm) | 304L (kg/m) | 316L (kg/m) | Duplex 2205 (kg/m) |
|---|---|---|---|---|---|
| ½" | 12.7 | 1.65 | 0.454 | 0.457 | 0.447 |
| ¾" | 19.05 | 1.65 | 0.715 | 0.720 | 0.703 |
| 1" | 25.4 | 1.65 | 0.976 | 0.982 | 0.960 |
| 1½" | 38.1 | 1.65 | 1.498 | 1.508 | 1.473 |
| 2" | 50.8 | 1.65 | 2.020 | 2.033 | 1.987 |
Interactive specification explorer with live filters (DOM-preserved for search indexing)
| Grade | Type | OD Range | Wall / Schedule | Internal Ra | Standards |
|---|---|---|---|---|---|
| SS 304L | Welded | ½" to 2" (12.7–50.8 mm) | 1.65 mm / SCH 10S | ≤0.4 µm | ASTM A269 / A270 |
| SS 304L | Seamless | ½" to 2" (12.7–50.8 mm) | 1.65–2.11 mm | ≤0.4 µm | ASTM A269 |
| SS 304L | Welded | 2½" to 6" (63.5–152.4 mm) | 2.11–2.77 mm | ≤0.4 µm | ASTM A269 / A270 |
| SS 304L | Welded | 8" to 12" (219.1–323.9 mm) | 2.77–3.05 mm | ≤0.4 µm | ASTM A269 |
Instant dimension calculation and Ra unit conversions for engineering procurement
Oils, cutting fluids and drawing residues are completely removed first. The finish is only as good as the chemical preparation.
Where weld heat tint or surface oxide is present, it is etched and activated so the pipe surface electropolishes uniformly.
The pipe acts as anode in an electrolytic acid bath. High microscopic peaks dissolve first, levelling the surface and stripping free iron.
The chromium-rich passive layer is stabilised per ASTM A967 / ASTM B912 to prevent future pitting and galvanic attack.
High-purity deionised water rinse removes all electrolytic residues, followed by hot air drying, capping and clean poly-sleeving.
| Document / Test | Status / Scope |
|---|---|
| MTC EN 10204 3.1 with heat-number traceability | Confirmed (Standard with every dispatch) |
| 100% PMI test and certificate | Confirmed (Handheld XRF on every pipe length) |
| Ra surface roughness test (stylus profilometer) & surface report | Confirmed (Supplied with measured Ra values) |
| Hydro (leak and pressure) test & certificate | Confirmed (Hydrostatic tested per ASTM spec) |
| Passivation verification and ferrite check | Confirmed (Reported in quality dossier) |
| QA inspection report and mill traceability | Confirmed (Approved origin mills) |
| Third-party inspection (TÜV / Bureau Veritas / SGS / DNV) | Accepted upon customer request |
Send your grade, OD × wall, Ra requirement, length and quantity. We'll quote within 24 hours.
Shop No. 05, Ground Floor, 113/117, Dr. MG Mahimtura Marg, 3rd Kumbharwada, Mumbai, Maharashtra 400004
Click below to view our direct engineer phone numbers, dispatch contacts, and official sales email.
We dispatch from Mumbai, and delivery time depends on size, quantity and stock; it is confirmed in writing with each quotation. We cap pipe ends, sleeve each length and pack for safe transit.
Every pipe we supply to Asansol adheres to strict international hygienic standards. Explore our core product specifications, Ra roughness certifications, and alloy grade properties: