Import Api Class Sm Fs Coupling — Buy in Bulk from Supplier in China

The API Class SM FS coupling is a forged steel pipe fitting designed for industrial fluid transport systems, meeting API 5L and API 5CT standards for pressure integrity. This coupling type uses a socket-weld or threaded connection, with a nominal size range of 5/8" to 1-1/8" as per the supplier’s stock. The unit weight is 0.41 kg, indicating a compact, lightweight design for ease of installation in tight piping layouts.

Forged from carbon or alloy steel, the SM FS series is standard for low to medium-pressure applications in oil and gas, petrochemical, and water treatment sectors. Typical material grades include ASTM A105 for carbon steel or ASTM A182 F22 for alloy, with a standard yield strength of 240 MPa or higher. The coupling’s internal threading conforms to NPT or BSP standards, with a typical wall thickness tolerance of ±12.5 % to ensure leak-proof joints under cyclic loads.

These couplings are primarily used by EPC contractors and maintenance teams for connecting small-bore piping in instrumentation, sampling, or auxiliary fluid lines. The supplier’s stock covers common diameters, reducing lead time for urgent projects. Buyers should confirm the exact thread type and pressure rating for compatibility with their system, as the SM FS variant is not rated for high-temperature service above 200 °C without additional heat treatment.

Yantai Pertoleum Machine Fittings Co., Ltd. is based in Dongxing Road, Shengquan Industrial Park, Laishan District, Yantai, Shandong Province, China. The company operates as an importer and distributor of pipe fittings, with a listed tier of imported goods and a harbor trust designation, indicating it sources components for domestic and international industrial markets.

The supplier’s profile does not state a response rate or average response time, which may reflect a focus on bulk inquiries rather than individual quotes. The address and industrial park location suggest proximity to Yantai’s port facilities, a logistical advantage for shipping pipe fittings to global buyers. No additional certifications, client lists, or production capacity details are provided in the available data.