1. Question: What are the standard surface finish options for your ERW pipes?
Answer: We offer three primary surface conditions:
Black Finish (Mill Finish): As-rolled with natural oxide scale. This is the most common and economical finish for general purposes.
Galvanized (Hot-Dipped): Coated with a layer of zinc to prevent corrosion, ideal for outdoor applications like fencing, handrails, and water lines.
Bare/Oil-Dipped: The pipe is pickled to remove scale and coated with a light rust-preventive oil for short-term protection during transit.
2. Question: Do you offer external coatings for corrosion protection, such as FBE or 3LPE?
Answer: Yes, we provide comprehensive anti-corrosion coating services. We can apply:
Fusion Bonded Epoxy (FBE): A single-layer epoxy coating for high-performance corrosion protection, often used for buried pipelines.
Three-Layer Polyethylene (3LPE) / Polypropylene (3LPP): A robust system consisting of an FBE layer, an adhesive copolymer, and an outer polyethylene layer. This is the industry standard for oil, gas, and water transmission pipelines requiring maximum protection.
Coal Tar Enamel (CTE): For specific project requirements.
We ensure the coating application is done in a controlled environment following standards like DIN 30670 or CSA Z245.21.
3. Question: How do you protect the pipe ends during transit and storage?
Answer: Proper end protection is vital to prevent damage to the bevel. For our ERW pipes, we offer several options:
Standard: Simple plastic end caps (snap-on).
Steel End Protectors: Heavy-duty steel rings welded or crimped onto the pipe ends for heavy-wall pipes or long sea voyages.
Beverage Can Ends: For small-diameter pipes, we can use heavy cardboard or metal "beverage can" style caps.
We can customize this based on your shipping method (container vs. bulk vessel).
4. Question: What are your standard length tolerances for fixed-length pipes?
Answer: For fixed-length orders, we adhere to international standards. Typically, we work with a tolerance of +10 mm / -0 mm. This means the pipe will be at least the length you ordered, and can be up to 10mm longer. If you require tighter precision (e.g., +/- 2mm) for modular construction projects, please let us know so we can quote our precision cutting service.
5. Question: What type of pipe end finishes do you provide? Plain, Beveled, or Threaded?
Answer: We offer all three, depending on the intended connection method:
Plain End (PE): Square cut or slightly chamfered, standard for welding or use with mechanical couplings.
Beveled End (BE): A 30-37.5 degree bevel (typically 30 degrees for standard butt-welding) is applied to facilitate strong, full-penetration field welds. This is the most common for line pipe.
Threaded and Coupled (T&C): Threads (usually NPT or API Round Thread) are cut onto the pipe ends, and a coupling is provided with each pipe.
