Callington · Weld Cleaning, Pickling & Passivation
Callington S-Weld Clean is a high-adhesion thickened pickling gel that removes black oxide scale, heat tint and weld discolouration from stainless steel, duplex and Inconel alloys, conforming to ASTM A380 and supplied in 1 kg, 2.5 kg and 23 kg packs complete with an acid-resistant application brush.
Price on request. Supplied from Abu Dhabi across the UAE and GCC — quotations include confirmed lead time and delivery terms.
Where it is used
Features
ASTM A380 is the standard practice for cleaning, descaling and passivating stainless steel parts, equipment and systems. Conformance is what lets a fabricator cite the treatment in an inspection and test plan rather than describe it as "cleaned".
The thickened gel formulation adheres to vertical and overhead surfaces, so a weld on the underside of a vessel or the side of a column can be pickled in place. A liquid pickle runs off and needs the component rotated; a gel does not.
A single-step treatment that removes black welding scale, discolouration and corrosion from stainless steel, leaving a clean, professional finish on the weld area.
Each pack comes complete with an acid-resistant application brush. Controlled brush application eliminates the product wastage that spraying a corrosive gel would cause, and keeps the acid off areas that do not need treating.
Fully water rinseable, so there is no extra solvent cleaning stage and no time lost. Rinse with clean potable water, ideally with a high-pressure jet.
Works on 200, 300 and 400 series stainless steels, duplex and super duplex grades, and Inconel 625. Pickling times differ substantially between them, and the table on this page gives the published figures.
Technical data
Published manufacturer specifications. Where a figure affects your welding procedure, confirm it against the instruction manual for your specific configuration.
| 200, 300, 400 series stainless | 5–30 minutes at 21–50 °C |
|---|---|
| Duplex grades | 60–90 minutes at 21–50 °C |
| Super duplex | 80–120 minutes at 21–50 °C |
| Inconel 625 | Longer than 300 series; establish by time trial. Start visual inspection at 25 minutes and continue until the required result is achieved. |
| Appearance & colour | Opaque white acidic gel, pungent acidic odour |
|---|---|
| pH (as supplied) | <1.0 |
| Specific gravity | 1.24–1.26 |
| Water solubility | Miscible |
| Boiling point | N/A |
| ASTM A380 | Conforms |
|---|
| Hazard | DANGER. May be corrosive to metals. Fatal if swallowed, or in contact with skin. Fatal if inhaled. Causes severe burns and eye damage. |
|---|---|
| Required first-aid provision | Obtain a supply of calcium gluconate gel before use. If skin contact occurs, remove all contaminated clothing immediately, wash gently with plenty of soap and water, then apply calcium gluconate gel. |
| Precautions | Highly corrosive. Keep only in the original container. Do not get in eyes, on skin or on clothing. Do not eat, drink or smoke when using this product. Do not breathe dust, fume, gas, mist, vapours or spray. Wear protective gloves and clothing, eye and face protection. Use only outdoors or in a well-ventilated area. |
| Storage & disposal | Store in a well-ventilated place, locked up, with the container tightly closed. Dispose of contents and container in accordance with local regulations. |
Ordering information
Quote these part numbers on your enquiry or LPO to guarantee the exact configuration. If you are unsure which variant suits your application, send us the joint details and we will specify it.
| Description | Part number |
|---|---|
| S-Weld Clean pickling gel, 1 kg Packed 12 units per carton. | 1100/30 |
| S-Weld Clean pickling gel, 2.5 kg Packed 6 units per carton. | 1100/78 |
| S-Weld Clean pickling gel, 23 kg Supplied each. | 1100/51 |
| Description | Part number |
|---|---|
| S-Weld Passivator Gel, 2.5 kg — applied after pickling | 1130/78 |
Operating essentials
Clean the weld area carefully using a stainless steel brush. Roll or shake the drum for 30 seconds before opening to ensure a smooth consistency, particularly if the product has not been used for some time. After welding, allow the area to cool below 40 °C before pickling.
Apply the gel with the acid-resistant brush provided. Do not pickle in direct sunlight. Do not allow the pickling agent to dry on the surface — if it does, wash down, dry and repeat the process.
Use the pickling time table on this page as the starting point. Times vary with ambient temperature, the grade of stainless steel, surface finish and welding method: a hot rolled surface may increase pickling time by 50%, and MIG welds may need longer than welds made with covered electrodes. At high ambient temperatures, or where longer times are needed, it may be necessary to repeat the process.
The best results come from continuous visual inspection of the surface. Over-pickling damages the finish and is not recoverable by further treatment — which is why the manufacturer prints the warning in capitals.
Rinse with clean potable water, ideally using a high-pressure water jet, and make sure no pickle residue is left on the surface. In environmentally sensitive areas use the bucket and rag method instead: wash and wipe down with a wet clean rag, then a dry clean rag, repeating until the surface is clean and free from acid.
S-Weld Clean can be used on Inconel 625, but its very high corrosion resistance means dwell time is longer than for 300 series and must be established rather than assumed. Produce test plates using the materials and methods of normal fabrication, apply the gel, and inspect at intervals starting from 25 minutes until the required result is reached. Use that as the benchmark.
Downloads
Need the instruction manual or spare parts list for this machine? Request it from weldiv@pofis.ae and we will send the current revision.
Frequently asked
5 to 30 minutes for 200, 300 and 400 series stainless at 21–50 °C; 60 to 90 minutes for duplex; 80 to 120 minutes for super duplex. Inconel 625 takes longer than 300 series and should be established by time trial starting at 25 minutes. A hot rolled surface may add 50%, and MIG welds generally need longer than welds made with covered electrodes.
Protective gloves and clothing, eye and face protection, and use only outdoors or in a well-ventilated area. The manufacturer also instructs you to obtain a supply of calcium gluconate gel before use — that is the specific first-aid treatment for this class of acid burn, and it needs to be on site before the work starts, not ordered afterwards. The product is fatal if swallowed, inhaled, or in contact with skin.
Yes. It is a thickened high-adhesion gel formulated specifically so it stays on vertical and overhead surfaces rather than running off.
Pickling removes black oxide scale, heat tint and surface contamination left by welding. Passivation then restores and enhances the chrome oxide layer that gives stainless steel its corrosion resistance. They are separate operations under ASTM A380, and most specifications require both — S-Weld Clean for the first, S-Weld Passivator Gel for the second.
Heat accelerates evaporation and the gel can dry on the surface, which both stops the reaction and leaves residue that is difficult to remove. If the product does dry on the surface, wash it down, dry it and repeat the process.
With clean potable water, ideally a high-pressure jet, making sure no residue is left. Where the work is in an environmentally sensitive area, use the bucket and rag method: wash and wipe with a wet clean rag, then a dry clean rag, repeating until the surface is free from acid.
Yes — it is suitable for stainless steels, duplex steel and Inconel alloys. Duplex needs 60–90 minutes and super duplex 80–120 minutes, against 5–30 minutes for standard 300 series. Inconel 625 requires a time trial to establish the benchmark.
POFIS supplies the Callington S-Weld range from Abu Dhabi across the UAE and GCC, in 1 kg, 2.5 kg and 23 kg packs. Request a quotation on this page or email weldiv@pofis.ae for price, pack sizes and lead time.
Procurement & supply
The Callington S-Weld Clean Pickling Gel is supplied from Abu Dhabi by Perfect Oilfield & Industrial Supply LLC across the UAE and GCC. The information below covers what procurement and QA/QC departments normally need before raising a purchase order.
Stock items dispatch from Abu Dhabi within 24–48 hours. Indent items are quoted with a confirmed lead time at the time of offer.
POFIS is an approved ADNOC vendor and is listed on the approved vendor lists (AVL) of major operators and EPC contractors across the GCC. We can complete supplier registration and prequalification documentation on request.
Standard credit terms are available to registered corporate accounts. LPO, LC and advance payment are all accepted.
Delivery across the UAE and the wider GCC. Quotations can be issued on EXW, FOB, CIF or DDP terms to suit your project.
Product is supplied to the manufacturer’s published specification, with a Certificate of Conformance available for every batch.
Technical support on product selection, inspection procedure and resupply from our Abu Dhabi welding division.
Price on request
Send the form and the POFIS welding division replies with pricing, confirmed lead time, delivery terms and availability. Tell us who you are and what the job is, so the reply can be specific to it rather than a catalogue price list.
