The Steel Pickling Line market can be divided principally by line type, which determines equipment configuration, throughput, and capital intensity. The dominant subtype is the continuous pickling line, characterized by an uninterrupted flow of steel strips through successive acid baths, rinsing, and drying stations; it accounts for roughly 60 % of total capacity because of its high productivity (up to 10 m/min) and suitability for large‑scale hot‑rolled coil processing. The batch pickling line operates on a discrete‑batch basis, loading a fixed length of strip into a sealed vessel for simultaneous acid exposure; its lower throughput (1–3 m/min) limits market share to about 25 %, yet it remains preferred for specialty alloys and small‑lot orders where surface uniformity is critical. The semi‑continuous pickling line blends features of both, using modular tanks that can be isolated for maintenance while maintaining a quasi‑continuous strand; it captures the remaining 15 % of installations, mainly in regions with moderate demand and constrained capital budgets. This type‑based taxonomy clarifies how each configuration contributes to overall market size by aligning capital outlay, operating cost, and production volume.