MaxDo Complete Stainless Steel Tube Production Line Delivered to Thailand: Full Factory Setup Case Study

Background: Why Thailand?

Thailand’s stainless steel tube market has grown steadily alongside the country’s construction, furniture manufacturing, and hospitality sectors — the latter driven by sustained hotel development in Bangkok, Phuket, Chiang Mai, and the Eastern Seaboard’s industrial and commercial zones. The Chon Buri client, a family-owned metal trading business transitioning into manufacturing, identified a consistent price and availability gap between imported Chinese decorative tube and what the domestic Thai market required.

The investment thesis: landed cost of imported 38 mm SS 304 Hairline tube from Chinese manufacturers — including freight, Thai import duty, and local distribution margin — was consistently 15–22% above domestically produced equivalent product from the few existing Thai tube manufacturers. With a new, correctly configured production line, the client calculated they could undercut the landed import price by 10–12% while maintaining a 28–32% gross margin — provided the equipment was capable, the raw material supply (SS coil imported from China and Taiwan under ASEAN+ FTA terms) was reliable, and the line could achieve payback within 18–24 months.

Equipment Package

The client required a turnkey approach — a single supplier responsible for slitting line, tube mill, and polishing line as an integrated production system, with matched infeed and outfeed speeds across all three machines.

Machine 1: Stainless Steel Slitting Line

• Coil width: 600–1,220 mm; thickness: 0.5–2.0 mm; weight: up to 5 tons
• Maximum 20 cuts (for narrow skelp at 19–25 mm tube OD applications)
• Ground matched spacer sets; blade clearance precision: ±0.005 mm (stainless mode)
• Slit width tolerance achieved: ±0.08 mm on SS 304, 0.8–1.2 mm thickness
• Production rate: 8–12 tons/shift on SS 304 (adequate for 1.5× tube mill coil consumption)
• Control: Siemens PLC, Thai-language HMI option available; English HMI selected by client

Machine 2: Combined Round + Square TIG Tube Mill

Key configuration detail: Rather than two separate machines for round and square tube, MaxDo configured a single tube mill with a round-to-square conversion section installed after the round sizing pass. This eliminated the need for separate round and square tube lines while enabling quick switching between profiles:

• Round tube forming: 16–18 passes, OD 19–76.2 mm
• Square tube conversion: 4-pass roll-forming after sizing; 15×15 mm – 50×50 mm square
• Changeover (round to square): approximately 90 minutes (roll set exchange)
• TIG welding: pulsed TIG power source (Panasonic), internal + external argon shielding
• OD tolerance (round): ±0.12 mm guaranteed at FAT
• Post-weld straightener and cold disc cut-off for clean burr-free tube ends
• Rated line speed: 3–12 m/min (wall-thickness-dependent)

Machine 3: 4-Head Automatic Polishing Line

• OD range: 19–76.2 mm round; 15×15 mm – 50×50 mm square (with profile polishing attachment)
• Grit sequence: 120 → 180 → 240 → 320 (producing No.4 / Hairline finish)
• Belt width: 100 mm
• Polishing speed: 3–6 m/min
• Infeed matched to tube mill outfeed conveyor speed
• Square tube polishing: 4-corner polishing attachment allows all four faces polished in sequence without manual repositioning

Factory Layout and Integration

MaxDo’s engineering team produced a factory layout plan for the client’s 1,200 m² production hall in Chon Buri before equipment manufacturing began. The integrated layout placed the three machines in sequence with material flow from east (coil storage / slitting) to west (polishing / finished tube racking), minimizing forklift cross-traffic and maximizing operator efficiency with a 3-person production team.

Floor layout summary:

Installation and Commissioning Timeline

FAT highlights: The client owner attended the Foshan FAT in person — a decision MaxDo encouraged because complex integrated systems benefit from the buyer seeing the full production cycle before shipment. At FAT:

• Slitting line produced SS 304, 1.0 mm, 10 strips at 80 mm width: measured ±0.07 mm ✓
• Tube mill produced 38.1 mm OD × 1.2 mm wall, 500 m continuous run: OD measured ±0.11 mm ✓
• Polishing line: 500 m of 38.1 mm tube polished to Hairline 240 grit; client approved surface standard ✓
• Square tube: 30×30 mm × 1.0 mm wall, 200 m; OD (face width) tolerance ±0.15 mm ✓

One item was flagged at FAT and corrected before shipment: the square tube polishing attachment required a minor adjustment to the corner polishing roll angle, which MaxDo’s engineer corrected on-site within 4 hours.

Production Performance After 12 Months

Output achieved: 1,250–1,450 m/day on single shift — within the 1,200–1,500 m/day target. On days with a single OD (no changeover), the line achieves the upper end of the range.

OD mix: The factory runs 3–4 different OD sizes per week, typically completing one full OD in a single day before changeover. The round-to-square changeover is performed approximately twice per week.

Surface finish acceptance rate: 97.2% first-pass acceptance on Hairline finish tube. The 2.8% rejection is primarily edge wave on thin-wall (0.6 mm) tube when incoming slit coil has substandard flatness — a raw material issue rather than a machine issue. The client has since tightened their coil supplier specification.

Market outcome: The client has replaced approximately 60% of their previously imported Chinese tube with domestically produced product within 12 months, with three new B2B customers (furniture manufacturers in Bangkok and Rayong) added since startup. Export sales to Vietnam have begun on a trial basis with two buyers, consistent with the original business plan.

Investment payback tracking: At 12 months post-startup, the client’s internal IRR calculation estimates payback will be achieved at approximately 20–22 months — within the 18–24 month target range. The primary variable that will determine whether the 18-month end is achievable is export volume growth.

Thailand and ASEAN Market Context

Thailand is the manufacturing hub of Southeast Asia, with the strongest industrial base in the region across automotive, electronics, food processing, and construction materials. The Eastern Seaboard industrial corridor (Chon Buri, Rayong, Chachoengsao) is home to a dense cluster of metal fabricators, furniture manufacturers, and construction materials producers — all potential customers for locally produced stainless steel decorative tube.

Thailand’s role as a re-export and distribution center for the broader ASEAN market adds a second commercial dimension: Thai-manufactured tube can access Vietnam, Malaysia, Indonesia, and the Philippines under ASEAN Free Trade Agreement (AFTA) terms with 0–5% preferential tariff rates, creating a regional competitive advantage versus Chinese-origin tube subject to full MFN duties in several ASEAN markets.

Frequently Asked Questions from Thai and ASEAN Buyers

What is the import duty on tube mill equipment in Thailand?
Most metalworking machinery imports into Thailand attract 0% import duty under Thailand’s machinery import promotion policy, subject to BOI (Board of Investment) eligibility or standard HS classification. Buyers should confirm with their Thai customs broker; MaxDo provides a full pre-shipment documentation package to facilitate clearance.

Does MaxDo provide Thai-language HMI?
Thai-language HMI is available on request. The Chon Buri client selected English HMI as their operators were comfortable with English for machine operation. MaxDo supports Thai-language interface if required.

Can MaxDo provide BOI investment documentation support for Thai factory projects?
MaxDo can provide technical specifications, equipment valuations, and production capacity documentation commonly required for BOI applications. Thai legal and BOI application services require a local Thai BOI advisor — MaxDo can refer buyers to Thai-based contacts on request.

What stainless coil supply options are available for Thai tube mills?
SS 304 and SS 201 cold-rolled coil can be sourced from: Thai domestic producers (Thaida, Sahamitr), Taiwanese mills (Yieh United, Yusco), Chinese mills (Baosteel, TISCO, Qingshan), and South Korean mills (POSCO). Thai buyers benefit from ASEAN-China FTA and ASEAN-Korea FTA preferential tariff rates for coil imports from these origins.

Next Steps

For investors and manufacturers in Thailand and the ASEAN region evaluating a stainless steel decorative tube investment:

• Integrated line consultation: MaxDo will prepare a complete slitting + tube mill + polishing line configuration matched to your target OD range, product mix, and output target
• FAT attendance: Encouraged for integrated system purchases — Thai buyers have visited MaxDo’s Foshan facility with flight connections via Guangzhou Baiyun Airport (direct Bangkok–Guangzhou route, ~3 hours)
• Reference visit: The Chon Buri factory reference visit can be arranged for qualified buyers evaluating a similar Thailand-based investment

→ Contact MaxDo for a complete line proposal for Thailand or ASEAN