NXF UNS NO7718/2.4668/NiCr19NbMo/alloy 718 DN15-1500 Class150-2500 Nickel Alloy Forged Fitting Blind Flanges

1. Raw Material Inspection：All steel raw materials are strictly checked before mass production. The factory verifies material chemical composition, mechanical properties, and original material test reports to ensure full compliance with required standards. Unqualified blanks will be rejected directly to guarantee foundational product quality.

2. Hot Forging and Forming：Qualified raw blanks are heated to professional forging temperature and forged into solid disc-shaped blank prototypes. The forging process refines internal metal grain structure, improves overall density, and enhances pressure resistance and structural toughness of blind flanges.

3. Heat Treatment：Stress relief heat treatment is performed on forged blanks to eliminate internal residual stress generated during forging. This procedure effectively prevents deformation and cracking in subsequent machining and high-pressure service, stabilizing product mechanical performance.

4. Precision CNC Machining：Professional CNC equipment is adopted for fine processing, including flange face turning, surface finishing, bolt hole drilling and chamfering. All dimensions, flatness and sealing surface precision are strictly controlled to meet ASME and international standard tolerances.

5. Nondestructive Testing：100% NDT inspection such as UT and PT is carried out to detect internal and surface defects including cracks, porosity and inclusions. Only defect-free flanges can enter the final procedure to ensure high-pressure safety performance.

6. Final Inspection and Packaging：Final inspection covers dimension verification, surface quality, marking and flatness test. Qualified products are stamped with grade, heat number and standard information, coated with anti-rust oil, and packed tightly for long-term transportation and storage.

1.Our NXF GROUP have our own factory, and we can control the cost by producing by ourselves. We have a great advantage in price and can give you the lowest price based on best quality.

2.Our NXF GROUP can strictly control the quality. We have production,quality inspection, warehousing and other departments to coordinate and control the quality,Such as PMI and size testing.

3.Our NXF GROUP biggest advantage is 3S service. Small quantity, short time, special materials.

4.Our NXF GROUP have excellent qualitycertificate system and trademark certificate

5.Our NXF GROUP have a comprehensive after sales service guarantee, such as the transaction guarantee provided by Alibaba International Station, as well as remote technical guidance and services.

6.Our NXF GROUP have a well-established logistics support system that can save you both time and money, providing you with a one-stop service.