Tubular profile for structural support (Strut), model LJ2131. "2131 mild steel pipe", "high strength" and "corrosion resistance", we can interpret this model more precisely: 1.  STRUT: Clearly identified The main use of this pipe is as a support member, often used in building structures, curtain walls, mechanical frames, scaffolding, pipe support systems, and other situations where pressure or stability is required. 2. LJ: This is usually the code of the manufacturer or brand. Different steel pipe manufacturers use their own prefixes to identify their product ranges. For example, it may represent "Lijin", "Longjiang", or other abbreviations of the manufacturer's name. To obtain more specific information (such as detailed specifications and material certificates), you need to know which manufacturer "LJ" specifically represents. 3. 2131: "2131 mild steel", which is very critical. Although "2131" is not as standard as common national standard steel scales (such as Q235B) or American standard steel scales (such as A36, A500), it is most likely a product grade or specification code within a specific manufacturer (LJ factory).    "Mild steel" means that it has a low carbon content (typically < 0.25%), which results in good weldability, formability, and toughness, making it a common choice for structural steel.    "High strength" indicates that the grade of steel may have achieved higher yield strength and tensile strength than ordinary mild steels (such as Q195, Q215) through specific composition design (such as adding trace alloying elements Mn, V, Nb, Ti) or production processes (such as controlled rolling, normalizing).    "Corrosion resistance" clearly points out an important characteristic of this tube. This is typically achieved through hot-dip galvanizing (HDG): This is the most commonly used method for corrosion protection for structural supports. A zinc-iron alloy layer and a pure zinc layer are formed on the surface, providing excellent electrochemical protection.        Pre-galvanized: The steel plate is galvanized before pipe making.        Coatings: Such as spraying epoxy, polyester powder, or other anti-corrosion coatings (although relatively galvanized is less commonly used for general purpose supports).        The material itself is weathering steel: such as national standard Q355NH, etc., but the description of "2131 mild steel" refers to ordinary mild steel coating protection. Summary & Key Points: Product: STRUT LJ2131 is a type of pipe for structural support.   Material base: Based on mild steel (manufacturer grade 2131), it has good weldability and formability.   Core Properties: High Strength: Meets the mechanical properties required as a support.    Corrosion resistance: This is most likely achieved through surface treatment, particularly hot-dip galvanizing, to adapt to different indoor and outdoor environments.   Model Meaning: 'STRUT' = Purpose (Support) 'LJ' = Manufacturer/Brand Code  

Field  of  application

Ideal  for  pipe installation as support structure for air ducts in interiors and  exteriors

Advantages

    Quick and efficient attachment of pipe sections and multiple pipe-ways