Welding Facilities • 17

Arc Welding

Versatile SMAW arc welding for structural and site work — all positions, all structural grades, certified to IS 7307 / ASME IX.

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Welding Facilities

Arc Welding

Versatile SMAW arc welding for structural and site work — all positions, all structural grades, certified to IS 7307 / ASME IX.

Shielded Metal Arc Welding (SMAW) — commonly known as stick or arc welding — is the most versatile and portable fusion welding process. Our certified welders work in all positions on structural steel, low-alloy steels, stainless and cast iron. Preferred for site work, repair welding and joints not accessible by MIG or TIG. Electrode selection is matched to parent material and service conditions, with preheat applied for alloy and thick sections.

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Materials

Mild Steel (IS 2062, ASTM A36)
Low-Alloy High-Strength Steel
Stainless Steel 304/316 (with compatible electrodes)
Cast Iron (with nickel electrodes)
Chrome-Moly (P1, P11, P22 with PWHT)

Applications

Structural steelwork — site connections and erection welds
Pressure vessel nozzle and repair welds
Pipeline girth welds and hot-tap connections
Heavy equipment repair and hardfacing

Technical Specifications

Current typeAC / DC (electrode positive or negative)

Current range20 – 500 A

Electrode diameter2.5 – 6.0 mm

Weld positionsAll positions 1G – 6G

Preheat capabilityUp to 400 °C (induction / flame)

Min material thickness4 mm (practical lower limit)

CertificationIS 7307 / ASME IX / BS EN ISO 9606

Electrode storageHeated quivers and rod ovens on-site

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Category: Welding Facilities

Reference: 17

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Key Features

What makes this service exceptional

All-position capability — flat, vertical, overhead, 6G pipe

Heated electrode quivers for low-hydrogen compliance

Preheat and interpass temperature monitoring

WPS / PQR documentation for each electrode-material combination

Site welding capability with portable inverter sets

Repair welding on castings and worn components

Frequently Asked Questions

SMAW is preferred for site work, confined spaces, and joints with poor access where MIG guns or TIG torches cannot reach. It is also more tolerant of surface contamination on structural steel.

Yes — preheat is applied by induction or flame to IS/ASME code requirements. Interpass temperature is monitored with contact thermometers and infrared guns.

Yes, with stainless electrodes (308L, 316L, 309L for dissimilar joints). We maintain a separate rod oven for stainless electrodes to prevent moisture pick-up.