| 1 | High-Frequency Welded Pipe Mill | Continuous strip forming followed by high-frequency induction or contact welding | Round, square and rectangular pipe; approximately 8–630 mm outside diameter depending on line configuration | Carbon steel, galvanized steel and selected low-alloy steel strip | Approximately 20–120 m/min, depending on pipe size, wall thickness and grade | Commonly configured for ASTM, API, EN or equivalent customer specifications | Stable weld seam, low diameter variation, consistent strip tension and reliable automatic sizing |
| 2 | Longitudinal Submerged Arc Welded Pipe Line | Plate forming with longitudinal submerged arc welding and mechanical expansion | Large-diameter pipe, commonly about 406–1,626 mm outside diameter | Carbon steel and low-alloy structural or pipeline steel plate | Typically 4–12 pipes per shift, depending on diameter, length and inspection requirements | Often designed for API 5L, ASTM A671, ASTM A672, EN 10217 or project-specific requirements | Full-penetration welds, controlled seam alignment, dimensional accuracy and documented non-destructive testing |
| 3 | Spiral Submerged Arc Welded Pipe Mill | Helical forming of steel strip with continuous submerged arc welding | Approximately 219–3,200 mm outside diameter, subject to strip width and forming angle | Carbon steel and low-alloy steel coil or strip | Commonly 1.5–4.0 m/min forming speed, depending on pipe diameter and wall thickness | Frequently specified against API 5L, ASTM A252, EN 10217-1 or equivalent standards | Uniform spiral seam, stable forming angle, accurate cut-off length and effective ultrasonic or radiographic inspection |
| 4 | Seamless Pipe Hot Rolling Line | Heating, piercing, elongation rolling, sizing and controlled cooling without a welded seam | Typical outside diameter from about 20–720 mm, depending on mill design | Carbon steel, alloy steel and selected stainless steel grades | Production rate varies widely; industrial lines may produce several hundred thousand tonnes annually | Common requirements include ASTM A106, ASTM A53, API 5L, EN 10216 and related specifications | Wall-thickness uniformity, concentricity, surface quality, heat-treatment control and end-to-end traceability |
| 5 | Cold Drawing Pipe Line | Cold drawing through a die and over a mandrel to reduce diameter or wall thickness | Small and precision tubes, commonly about 3–120 mm outside diameter | Carbon steel, stainless steel, copper alloys and selected high-strength alloys | Usually 5–60 m/min drawing speed, depending on reduction, material and pass schedule | Typical requirements include ASTM A519, ASTM A269, EN 10305 and customer dimensional specifications | Very tight dimensional tolerance, smooth internal and external surfaces, straightness and repeatable mechanical properties |
| 6 | Pipe End-Facing and Chamfering Machine | Automatic or semi-automatic cutting, facing, beveling and end preparation | Commonly suitable for pipe outside diameters from about 20–1,200 mm | Carbon steel, stainless steel, alloy steel and galvanized pipe | Approximately 2–30 pieces per minute, depending on diameter, wall thickness and end profile | End geometry is normally matched to welding, threading, socketing or pipeline assembly requirements | Consistent bevel angle, controlled root face, low burr formation and accurate pipe length |
| 7 | Pipe Threading and Grooving System | External or internal threading, roll grooving and preparation for mechanical connections | Typically covers approximately 15–600 mm nominal pipe size | Carbon steel, galvanized steel, stainless steel and ductile iron where applicable | Approximately 3–20 pieces per minute depending on connection type and pipe size | Commonly aligned with ISO, ASME, API, ASTM or coupling-manufacturer connection requirements | Thread pitch accuracy, groove depth, concentricity, surface finish and repeatable gauge inspection results |
| 8 | Pipe Hydrostatic Testing System | Water filling, air removal, pressure holding and automated leakage detection | Small- to large-diameter welded and seamless pipe, subject to test-bench design | Carbon steel, alloy steel and stainless steel pipe | Typical test pressure ranges from approximately 5 to 100 MPa, depending on pipe specification | Testing may follow API 5L, ASTM A53, ASTM A106, EN 10217 or project-specific procedures | Pressure stability, calibrated instrumentation, accurate hold time, end-seal reliability and complete test records |
| 9 | Pipe Ultrasonic and Eddy Current Inspection Line | Non-destructive testing of welds, surfaces and material discontinuities | Applicable to welded or seamless pipe across a broad diameter range | Carbon steel, stainless steel, copper alloys and other conductive metals | Inspection speed may reach approximately 5–120 m/min depending on method and resolution | Commonly configured to ISO 10893, ASTM E213, ASTM E273, API 5L or equivalent NDT requirements | Reference-standard sensitivity, probe alignment, calibration stability, defect detection and data traceability |
| 10 | Pipe Coating and Lining Production Line | Surface preparation followed by fusion-bonded epoxy, three-layer polyethylene, powder or liquid coating | Commonly supports pipe diameters from about 50–1,500 mm, depending on layout | Carbon steel and selected alloy steel pipe | Approximately 2–15 m/min coating speed, depending on coating system and thickness | Frequently associated with ISO 21809, DIN 30670, CSA Z245.20 or project coating specifications | Surface cleanliness, coating thickness, adhesion, holiday detection, curing control and impact resistance |