Haldia is eastern India's petrochemical and port city, with a refinery, a large petrochemical complex and chemical and fertiliser plants on a salt-air estuary. We manufacture and electropolish SS 316L and duplex 2205 pipes and tubes and supply the clean-utility, sampling and laboratory lines of these plants, and the contractors who serve them, with MTC EN 10204 3.1, 100% PMI testing and a measured Ra report on every order.
| Zone / MIDC | Typical End-Use | Application | Our Usual Spec |
|---|---|---|---|
| Haldia petrochemical, refinery and chemical belt | Petrochemicals, refining, industrial chemicals, fertiliser | DM-water, sampling, instrument and laboratory lines; not main process service | 316L; duplex 2205 for chloride duty |
| Haldia Industrial Park (Durga Chawk, within the port-trust area) | Smaller chemical, engineering and manufacturing units | Clean utility, process water, skid assemblies | 316L / 304L |
| Haldia Dock and liquid terminals | Port services, bulk and liquid handling | Chloride-heavy and salt-air duty | Duplex 2205; super duplex for severe cases |
| Contractors and fabricators serving the complex | Turnaround, maintenance and extension work | Spares, headers, skids, cut-to-length supply | 316L / 304L, traceable cut lengths |
| Food and agro units around Haldia | Food and agro processing | Hygienic transfer, wash lines | 304L; 316L for chloride-bearing wash |
Duplex 2205 and 316L, chosen for chloride resistance rather than finish alone.
Smooth, passivated stainless for demineralised-water and water-analysis lines.
Small-bore stainless tube cut to drawing, for the analysis lines that need clean, traceable material.
Cut lengths supplied against your drawing and schedule.
Cut-to-length pipe with heat-number traceability for the shops that maintain and extend the plants.
Smooth, passivated 316L and 304L for utility blocks and process-water lines.
| 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 316L | Welded | ½" to 2" (12.7–50.8 mm) | 1.65 mm / SCH 10S | ≤0.4 µm (SF4) | ASTM A269 / A270, ASME BPE |
| SS 316L | Seamless | ½" to 2" (12.7–50.8 mm) | 1.65–2.77 mm / SCH 40S | ≤0.4 µm (SF4) | ASTM A269, ASME BPE |
| SS 316L | Welded | 2½" to 6" (63.5–152.4 mm) | 2.11–2.77 mm / SCH 10S | ≤0.4 µm | ASTM A269 / A270 |
| SS 316L | Seamless | 2½" to 6" (63.5–152.4 mm) | 2.77–3.05 mm / SCH 40S | ≤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 the pipe ends, sleeve each length and pack for the journey and for the humid, saline air, so the electropolished finish arrives undamaged. If your turnaround has a fixed date, tell us when you enquire and we'll say plainly whether it fits.
Every pipe we supply to Haldia adheres to strict international hygienic standards. Explore our core product specifications, Ra roughness certifications, and alloy grade properties: