What are the core characteristics of LSAW steel pipes?
Manufactured using the straight seam submerged arc welding process, with a single steel plate formed in one go. Advantages: high dimensional accuracy (ellipticity ≤ 0.6%), extremely strong pressure resistance, specifically designed for high-pressure oil and gas transportation and complex terrain pipeline projects.
What are the typical engineering applications of SSAW steel pipes?
FBE: Single-layer fusion-bonded epoxy powder, providing basic chemical corrosion protection; 3LPE: FBE + adhesive layer + polyethylene, offering resistance to mechanical damage and suitability for harsh environments; 3LPP: FBE + adhesive layer + polypropylene, with high-temperature resistance >110°C, used for hot oil/steam pipelines. Cost: FBE < 3LPE < 3LPP
What are the core differences between APl 5L and lS0 3183?
API 5L (American standard) specifies oil and gas transmission pipes, focusing on chemical composition and mechanical properties; ISO 3183 (international standard) adds toughness and defect acceptance requirements, which are more stringent and applicable to global projects. Both cover PSL1/PSL2 classifications.
What are the differences in the application areas of EN 10217 and EN 10219?
EN 10217: Standard for welded steel pipes for pressure applications, used for liquid/gas transportation (e.g., water pipes, gas pipes); EN 10219: Standard for cold-formed welded structural tubes, used for building frames and mechanical supports, emphasizing dimensional tolerances.
What are the fundamental differences between ASTM A53 and ASTM A500?
SSAW pile pipes are recommended (low cost + high production efficiency), with a wall thickness of ≥12 mm to ensure load-bearing capacity. Standards: ASTM A252 (welded pile pipes) or SY/T 0135 (spiral pile pipes).
How should urban drinking water pipelines be selected?
Food-grade lined steel pipes (e.g., FBE or 3LPE inner coating) must be used. Pipe material selection: SSAW/LSAW (balancing cost and pressure). Standards: EN 10255 (threaded pipes) + NSF/ANSI 61 health certification.
Key considerations for selecting high-pressure natural gas transmission pipelines?
LSAW steel pipes (pressure rating ≥ X70 grade) + 3LPE corrosion protection (resistance to soil stress) must be used. Standard combination: API 5L PSL2 (pipe material) + SY/T 0413 (coating). SSAW pipes (insufficient pressure rating) are strictly prohibited.
