Merchant couplings are designed to connect pipes in a straight-line configuration, commonly used in low-pressure applications such as water, oil, air, or gas lines. However, they are not suitable for high-pressure environments. Typically made from steel tubing, these couplings are available in various finishes, including carbon, galvanized, stainless, and black
While sometimes mistaken for simple thread protectors, merchant couplings serve a crucial function by joining pipes to create long, continuous runs. They are most effective in low-pressure systems, specifically those operating at 150 PSI or less, and in moderate temperature conditions.
These couplings are available in both tapered and straight (non-tapered) styles. For applications requiring a solid, tight seal, the tapered style is the superior choice, as it creates a progressively tighter connection when screwed on. In contrast, straight-line couplings may not achieve the same level of sealing. Ultimately, the coupling must be welded to the pipe for a secure fit. Many merchant couplings feature a chamfered end to accommodate the welding process.
Merchant couplings are the ideal solution when strength is required for straight-line pipe runs. They are manufactured from strong steel, not malleable iron, making them a more durable choice compared to other coupling types in these specific applications.
With extensive experience in manufacturing merchant couplings, the team at Detroit Nipple Works is ready to help you select the right type for your specific application. Choosing the correct pipe coupling from the start is essential for ensuring your project’s integrity and long-term success. Our goal is to make sure you have the ideal pipe nipples and fittings for the job.
Contact us for all your needs, including fittings, pipe nipples, pipes, tubing, and valves. Rely on our experience to ensure your project is completed correctly and to the highest standard.