Material Types	Chemical Composition	Corrosion resistance	Mechanical strength	Applications	Cost
304 Stainless Steel	18%Cr-8%Ni	Good	Medium	General industrial environments, food and pharmaceuticals	Low
316 Stainless Steel	16%Cr-10%Ni-2%Mo	Excellent	Medium	Chemical industry, marine environments, chloride ion environments	Medium
Duplex Stainless Steel	22%Cr-5%Ni-3%Mo-N	Very good	High	Seawater, petrochemicals, high temperature and high pressure environments	High

Selection Recommendations:

General Use: 304 stainless steel offers the best cost-performance ratio.

High Corrosion Resistance: Choose 316 stainless steel (especially for chlorine-containing environments).

High Strength and Corrosion Resistance: Choose duplex stainless steel 2205/2507.

Specific Selection: Please contact our technical engineers for professional advice based on your working conditions.

Nickel alloys have significant advantages in specific environments:

High-Temperature Performance:

Operating temperature can reach over 1000°C. Maintains good strength and oxidation resistance at high temperatures. Suitable for boilers, heat exchangers, and high-temperature furnaces.

Extreme Corrosive Environments:

Resistant to strong acids (sulfuric acid, hydrochloric acid, phosphoric acid). Resistant to strong alkalis and halide corrosion. Resistant to stress corrosion cracking.

Special Properties:

Good low-temperature toughness. Excellent creep resistance. Strong fatigue resistance.

Typical Applications:

Chemical Equipment: Reactors, Distillation Towers
Oil & Gas: Acid Gas Field Pipelines
Power Industry: Boiler Tubes, Superheater Tubes
Aerospace: Engine Components

We offer a comprehensive range of size standards and pressure ratings:

Size Standards:

• International Standards: ASME B16.9, B16.11, B16.28
• European Standards: EN 10253, DIN 2605
• National Standards: GB/T 12459, GB/T 13401
• Japanese Standards: JIS B2311, B2312, B2313

Pressure Ratings:

• American Standards: SCH 10S, 40S, 80S, 160S, XXS
• European Standards: PN6, PN10, PN16, PN25, PN40
• Special Ratings: Customized according to customer requirements

Selection Guidelines:

• Confirm Operating Pressure: 1.5-2 times the design pressure for safety.
• Consider Temperature Effects: Material strength decreases at high temperatures.
• Media Characteristics: Corrosive media require higher ratings.
• Service Life: Higher ratings are recommended for long-term use.

We have established a comprehensive quality assurance system:

1. Raw Material Control:

All raw materials are sourced from renowned steel mills (Baosteel, Taiyuan Iron & Steel, POSCO, etc.).

Each batch of materials undergoes chemical composition and mechanical property testing.

Material traceability management (heat number and batch number tracking).

2. Production Process Control:

CNC machining ensures dimensional accuracy.

Welding procedure qualification (PQR/WPS).

Online inspection to promptly detect quality issues.

3. Testing Equipment:

Spectrometer: Material composition analysis.

Universal testing machine: Mechanical property testing.

Metallurgical microscope: Microstructure analysis.

Non-destructive testing equipment: UT, PT, MT, RT testing.

4. Certification System:

ISO 9001 Quality Management System Certification.

PED/CE EU Pressure Equipment Directive Certification.

ASME U stamp certification.

Special Equipment Manufacturing License.

5. Factory Inspection:

100% dimensional inspection.

Surface quality inspection.

Pressure testing (hydraulic/air pressure).

Final packaging inspection.

We provide complete certification and testing documents:

Required Documents:

• Material Certificate: MTC (Material Test Certificate)
• Chemical Composition Report: Spectroscopic Analysis Report
• Mechanical Property Report: Tensile, Hardness, Impact Test Reports
• Non-Destructive Testing Report: UT/PT/MT Test Reports
• Dimensional Inspection Report: Dimensional records conforming to standards
• Pressure Test Report: Hydrostatic/Gas Pressure Test Records

Optional Documents:

• Heat Treatment Report
• Metallographic Analysis Report
• Corrosion Test Report
• Third-Party Inspection Report (SGS, BV, TÜV, etc.)

Certificates:

• Copy of Quality System Certification Certificate
• Product Certification Certificate
• Factory Qualification Certificate

The service life of pipe fittings is affected by several factors:

Material Selection: Suitable materials can extend service life by 3-5 times.
Operating Environment: Temperature, pressure, media corrosiveness.
Usage Conditions: Frequent start-stop cycles, temperature and pressure fluctuations.
Maintenance: Regular inspection and maintenance.

Estimated Service Life:

General Industrial Environment: 304/316 Stainless Steel - 15-20 years
Chemical Environment: Duplex Stainless Steel/Nickel Alloy - 20-25 years
High Temperature and High Pressure Environment: Nickel Alloy - 15-20 years
Seawater Environment: Super Duplex Stainless Steel/High Alloy - 20-30 years

Recommendations for Extending Service Life:

Select suitable materials and specifications
Avoid operation under excessive temperature and pressure
Regularly inspect wall thickness and corrosion
Replace damaged parts promptly.

The delivery cycle depends on the complexity and quantity of the product:

Standard Products (Common Sizes, Common Materials):

Small Batch (<100 pieces): 7-15 working days
Medium Batch (100-500 pieces): 15-30 working days
Large Batch (>500 pieces): 30-60 working days

Customized Products:

Simple Customization (Special Sizes): 15-25 working days
Complex Customization (Special Materials/Processes): 25-40 working days
High-Difficulty Customization (Mold Development Required): 40-60 working days

Expedited Service:

We offer expedited production services, which can shorten the standard cycle by 30-50%. Expedited fees are negotiable based on the urgency.

Ordering Process:

1. Technical Consultation: Provide operating parameters and receive material selection advice.
2. Quote Confirmation: Receive a detailed quotation and confirm price and terms.
3. Contract Signing: Sign a formal sales contract.
4. Production Arrangement: Production begins after prepayment.
5. Delivery and Acceptance: Upon completion of production, ship the goods and provide relevant documents.
6. After-Sales Service: Installation guidance and technical support.

Payment Methods:

• Wire Transfer: Transfer from company bank account.
• Letter of Credit: Accepts sight letters of credit (L/C at sight).
• Banker's Draft: Accepts bank acceptance drafts.
• Online Payment: Supports Alipay and WeChat Pay (small amounts).
• Installment Payment: Installment payment can be negotiated for large orders.

Payment Ratio:

Prepayment: 30% (after contract signing)
Pre-shipment Payment: 60% (before shipment upon completion of production)
Warranty Deposit: 10% (paid 6-12 months after acceptance)

We offer a variety of packaging and shipping options:

Packaging Methods:

• Standard Packaging:
  • Wooden Crate Packaging: Moisture-proof, shockproof, suitable for long-distance transport
  • Pallet Packaging: Suitable for container transport
  • Stretch Wrap Packaging: Dust-proof and moisture-proof

• Marking and Labeling:
  • Each product has a permanent mark. 
  • Clearly marked exterior packaging. 
  • Packing list and product list included.

• Domestic Shipping:
  • Express: Small samples (SF Express, Deppon Logistics)
  • Dedicated Line Logistics: Bulk shipments
  • Full Truckload Shipping: Large shipments

• International Shipping:
  • Sea Freight: Full Container Load (FCL)/Less than Container Load (LCL)
  • Air Freight: Urgent small shipments
  • International Express: DHL, FedEx, UPS

• Transportation insurance provided.
• Compensation for lost or damaged goods.
• Real-time cargo tracking.

Stainless steel pipe fittings are widely used in the following industries:

1. Petrochemical Industry:

Oil refining units: catalytic cracking, hydrocracking
Chemical equipment: reactors, heat exchangers, towers
Natural gas processing: desulfurization, dehydration units

2. Power Energy Industry:

Thermal power generation: boiler pipes, steam and water pipes
Nuclear power: nuclear island, conventional island pipes
New energy: solar thermal power generation, geothermal power generation

3. Food and Pharmaceutical Industry:

Food processing: beverage, dairy production lines
Pharmaceutical equipment: clean piping, bioreactors
Drinking water treatment: water supply pipes, water treatment equipment

4. Marine Engineering:

Offshore platforms: production platforms, drilling platforms
Shipbuilding: ballast water systems, fuel oil systems
Seawater desalination: reverse osmosis unit pipes

5. Building Decoration:

Building water supply and drainage: drinking water pipes
Decorative engineering: handrails, railings, curtain walls
HVAC: heating and ventilation ducts

Indications requiring immediate replacement:

• Severe corrosion: Wall thickness reduction exceeding 10% of design thickness
• Obvious cracks: Cracks or defects visible to the naked eye
• Severe deformation: Obvious bending, twisting, or flattening
• Leakage: Media leakage that cannot be resolved by tightening.

Indications requiring maintenance or monitoring:

• Minor corrosion: Uniform corrosion, thinning <10%.
• Surface defects: Scratches, pits that do not affect the structure.
• Minor deformation: Minor deformation that can be corrected.
• Connection problems: Flange damage, thread damage.

1. Technological Advantages:

• Professional technical team with over 20 years of industry experience
• Independent R&D capabilities, multiple patented technologies
• Comprehensive testing laboratory and technology center

2. Quality Advantages:

• Strict quality control system
• Complete international standard certifications
• 100% factory inspection, zero-defect target

3. Service Advantages:

• Rapid response, 24-hour technical consultation
• Customized solutions
• Comprehensive after-sales service network

4. Supply Chain Advantages:

• Stable raw material supply channels
• Modern production equipment
• Efficient logistics and distribution system

5. Cost-Effectiveness Advantages:

• Reasonable pricing
• Preferential policies for long-term cooperation
• Comprehensive technical support and training

6. Customer Testimonials:

• Over 500 long-term cooperative clients
• Customer satisfaction rate over 98%
• Recipient of "Excellent Supplier" award multiple times