1. Raw Material Preparation- Select high-quality steel (e.g., carbon steel, stainless steel) as raw material, inspect for chemical composition and mechanical properties.
2. Cutting- Cut the raw steel into fixed-length blanks using a cutting machine (e.g., band saw, plasma cutter).
3. Forging/Hot Forming- Heat the blanks to the forging temperature (800-1200℃) and shape them into the basic nipple structure via forging press or hot rolling.
4. Machining- Use CNC lathes to machine the outer diameter, inner bore, and end faces to meet dimensional tolerances.- Process internal/external threads with a thread cutting tool or tapping machine (complying with standards like API, BSP, NPT).
5. Heat Treatment- Perform quenching and tempering to improve hardness, toughness, and wear resistance of the threaded nipple.
6. Surface Treatment- Conduct pickling, passivation (for stainless steel), or galvanization (for carbon steel) to enhance corrosion resistance.
7. Inspection & Testing- Dimensional inspection: Verify thread accuracy, outer diameter, length, and inner bore with calipers, thread gauges, and coordinate measuring machines (CMM).- Non-destructive testing (NDT): Use ultrasonic testing (UT) or magnetic particle testing (MT) to detect internal defects.- Pressure testing: Conduct hydrostatic or pneumatic testing to ensure sealing performance.
8. Cleaning & Packaging- Clean the finished products to remove oil, debris, and rust; package them in wooden cases or cartons with anti-rust materials.
total 0 Sheet,Only 5 images can be uploaded, each less than 5m.