ZIZI ENGINEERING CO.,LTD
ZIZI ENGINEERING CO., LTD
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Quality stainless steel NPT threaded pipe fittings are our hot sale product, which are available in sizes of 1/8", 1/4", 3/8", 1/2", 1/4", 1", 1 1/4", 1 1/2" and 2" with pressure of 2000lb, 3000lb, 6000lb according to ASME B16.11.
NPT (National Pipe Thread) seals are the most popular type of seal for pressure calibration systems in the U.S. and Canada. It is known as ANSI/ASME B1.20.1 pipe threads. And measure tapered threads on threaded pipes and fittings.
There are six thread types which most commonly used on forged pipe fittings.
| Size | 1/8" to 4" / DN6 to DN100 |
| Pressure Rating | 2000LB, 3000LB, 6000LB |
| Standard | ASME B16.11, BS3799, GB/T14626 |
| Surface | Anti-rust Oil |
| Stainless Steel | ASTM A182 F304/304L, F304H, F316/316L, F310, F317, F321, F347 |
The dimensions and tolerances of threaded fittings in accordance with ANSI/ASME B16.11 as follow table. It is very useful for inspection and make products qualified.
Marking and Packing
Inspection
Advantages
Chemical Composition
| Grade | C | Mn | P | S | Si | Cr | Ni | Mo |
| 304 | 0.08 | 2 | 0.045 | 0.03 | 1 | 18-20 | 8-11 | / |
| 316 | 0.08 | 2 | 0.045 | 0.03 | 1 | 16-18 | 10-14 | 2-3 |
Mechanical Properties
| Grade | Tensile Strength | Yield Strength | Elongation |
| 304 | 515 (Mpa) | 205 (Mpa) | 30 (%) |
| 316 | 515 (Mpa) | 205 (Mpa) | 30 (%) |