Vapi is Gujarat's chemical, dye and pharma hub. We manufacture and electropolish SS 316L and duplex 2205 pipes and tubes and supply Vapi's plants directly, with MTC EN 10204 3.1, 100% PMI testing and a measured Ra report on every order.
Vapi sits in Valsad district on the Mumbai–Surat highway, on the Gujarat side of the Maharashtra border. Its GIDC estate, about 1,135 hectares, is one of the largest chemical estates in the country, with specialty chemicals, dyes and intermediates, pesticides, pharma, paper and textile units. Sarigam GIDC, about 395 hectares to the south, and the Umbergaon area add more chemical, pharma and engineering plants, and Valsad itself has a smaller GIDC estate. Effluent from the Vapi estate is handled through a dedicated common effluent company, so plants here operate under close regulatory scrutiny. A word on fit: Much of the reactor-side piping in dye and chemical plants uses glass-lined or specialty-alloy materials, and paper and pulp lines carry aggressive chemistry. Where we're useful is the clean side: purified water, WFI, clean utilities, laboratory lines and food lines, plus chloride-bearing duties where duplex 2205 is the better answer.
| Zone / MIDC | Typical End-Use | Application | Our Usual Spec |
|---|---|---|---|
| Vapi GIDC (Phases I-IV) | Specialty chemicals, dyes and intermediates, pesticides, pharma, paper | Purified water, clean utility, laboratory lines; process lines after a media check | 316L; duplex 2205 for chloride duty |
| Sarigam GIDC | Chemicals, petrochemical-linked, pharma and polyester units | Process and clean-utility lines, purified water | 316L / duplex 2205 |
| Umbergaon area | Chemicals, steel and engineering | Clean utility, DM water, process water | 304L / 316L |
| Valsad and Atul belt | Chemicals, bioscience and pharma | Purified water, clean utility | 316L, internal Ra ≤0.4 µm, surface report |
| Paper, pulp and textile units | Paper mills and textile processing | Clean-side water and dosing lines only | 316L; avoid aggressive process streams |
| Bhilad and the border belt | Mixed light industry | Clean utility, small-lot fabrication | 304L |
316L with a smooth internal surface and verified passivation.
DM-water, sampling, instrument and laboratory lines.
Duplex 2205, once we have checked your fluid, concentration and temperature.
A smooth bore cleans faster and drains better.
Cut-to-length pipe with heat-number traceability, for fabricators serving Vapi's plants.
Guaranteed Ra roughness to SF4 standards with complete profilometer logs.
| 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 Vapi adheres to strict international hygienic standards. Explore our core product specifications, Ra roughness certifications, and alloy grade properties: