Visakhapatnam is Andhra Pradesh's port and industrial capital, with a pharma SEZ at Duvvada, a coastal steel, refining and port belt, and the country's densest bulk-drug region south of the city. We manufacture and electropolish SS 316L and duplex 2205 pipes and tubes and supply Vizag's plants, contractors and fabricators directly, with MTC EN 10204 3.1, 100% PMI testing and a measured Ra report on every order.
Visakhapatnam is a deep-water port city on the Bay of Bengal, and its industry sits in several belts. The Visakhapatnam Special Economic Zone at Duvvada is one of India's older multi-product SEZs and hosts formulation plants for large pharma makers. The APIIC industrial park at Aganampudi lists pharma units, and a large pharma SEZ at Chippada village, north-east of the city, has been operating for years. The port, steel plant and refinery form the city's heavy-industry core, and the coastal location means salt-laden air and chloride-bearing water are part of every project. Further south, the Jawaharlal Nehru Pharma City at Parawada, the Atchutapuram SEZ and Nakkapalli have their own page.
A word on fit. Steel-making, refining and port operations run on carbon steel and specialty alloy, and their main process piping isn't electropolished. Where we're useful is the pharma plants' purified water, WFI and clean utilities, DM-water and sampling lines inside the heavy plants, chloride-heavy duty where duplex outperforms standard stainless, and the contractors who maintain them.
| Zone / MIDC | Typical End-Use | Application | Our Usual Spec |
|---|---|---|---|
| Visakhapatnam SEZ, Duvvada | Pharma formulation and multi-product manufacturing | WFI, purified water, CIP, clean utility, laboratory lines | 316L, internal Ra ≤0.4 µm, surface report |
| Aganampudi APIIC industrial park | Pharma and mixed manufacturing | Purified water, clean utility, skid assemblies | 316L / 304L |
| Chippada pharma SEZ | Bulk-drug and API manufacturing | Clean-side purified water, WFI and utility lines; process lines after a media check | 316L; duplex 2205 for chloride duty |
| Port, steel plant and refinery belt | Heavy industry and energy | DM-water, sampling, instrument and laboratory lines; not main process | 316L / 304L; duplex 2205 for chloride-heavy duty |
| Contractors and fabricators (Gajuwaka and the city estates) | Maintenance, turnaround and equipment building | Spares, headers, skids, cut-to-length supply | 304L / 316L, traceable cut lengths |
| Seafood and food processing | Fish and food processing | Hygienic transfer, wash lines, CIP | 316L (salt and brine); 304L for dry-side lines |
316L with a smooth internal surface and verified passivation, for formulation and API sites.
Duplex 2205 and 316L, chosen for chloride resistance rather than finish alone.
Smooth, passivated 304L and 316L for demineralised-water and analysis lines.
Clean, documented tubing for in-plant QC and R&D labs.
Cut lengths supplied against your drawing and schedule.
Cut-to-length pipe with heat-number traceability for the shops that serve Vizag's plants.
| 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.
Every pipe we supply to Visakhapatnam adheres to strict international hygienic standards. Explore our core product specifications, Ra roughness certifications, and alloy grade properties: