Product Overview
GS Pipeline is a professional manufacturer and global supplier of NACE sour service pipe fittings designed for demanding oil & gas applications containing hydrogen sulfide (H₂S).
Our complete range of butt weld fittings and socket weld fittings are manufactured according to NACE MR0175 / ISO 15156 requirements, ensuring reliable resistance against:
- Sulfide Stress Cracking (SSC)
- Hydrogen Induced Cracking (HIC)
- Hydrogen embrittlement
- Sour corrosion damage
NACE sour service fittings are widely used in:
- Sour gas transmission pipelines
- Oilfield production facilities
- Refinery process piping
- Petrochemical plants
- Offshore platforms
- Natural gas treatment systems
GS Pipeline controls the entire manufacturing process from raw material selection to final inspection, ensuring each fitting meets international sour service requirements.
Key Features of NACE Sour Service Pipe Fittings
Designed for Extreme H₂S Environments
Hydrogen sulfide environments can cause severe cracking and corrosion in conventional steel materials.
Our sour service fittings are engineered with:
✔ Low impurity steel chemistry
✔ Controlled hardness
✔ Fine grain structure
✔ Proper heat treatment
✔ Full material traceability
to achieve long-term reliability in corrosive operating conditions.
NACE MR0175 / ISO 15156 Compliance
All materials and manufacturing processes comply with:
- NACE MR0175
- ISO 15156
The standard provides requirements for metallic materials used in oil and gas production environments containing H₂S.
Controlled Chemical Composition
Sour service fittings require strict control of chemical elements.
Typical requirements include:
| Element | Control Requirement |
| Carbon (C) | Low carbon content |
| Phosphorus (P) | Controlled low level |
| Sulfur (S) | Controlled to reduce cracking risk |
| Carbon Equivalent (CE) | Controlled according to NACE requirements |
Low carbon and impurity levels improve resistance against SSC and hydrogen-related failures.
Applicable Manufacturing Standards
GS Pipeline NACE pipe fittings comply with international standards:
Butt Weld Fittings Standards
- ASME B16.9
- MSS SP-75
- ASTM A234
- ASME SA234
Socket Weld & Threaded Fittings Standards
- ASME B16.11
- ASTM A105
- ASTM A182
Sour Service Standards
- NACE MR0175
- ISO 15156
Sour Service Pipe Fitting Material Grades
Carbon Steel Sour Service Fittings
ASTM A234 WPB NACE
Applications:
- Sour oil pipelines
- Gas transmission systems
- Refinery piping
Features:
- Fully killed fine grain steel
- Excellent weldability
- Controlled hardness
- Suitable for H₂S environments
Fine Grain Normalized Carbon Steel
Special sour service carbon steel grades provide:
- Improved toughness
- Reduced cracking sensitivity
- Stable mechanical properties
Common applications:
- High pressure pipelines
- Oilfield facilities
- Gas processing units
Stainless Steel Sour Service Fittings
ASTM A403 WP304 / WP304L NACE
Features:
- Excellent corrosion resistance
- Good weldability
- Suitable for chemical processing systems
Applications:
- Chemical plants
- Gas treatment facilities
- Corrosive fluid pipelines
ASTM A403 WP316 / WP316L NACE
Advantages:
- Improved chloride resistance
- Better marine performance
- Suitable for offshore environments
Applications:
- Offshore oil & gas
- Seawater processing systems
- Sour gas facilities
Duplex Stainless Steel Sour Service Fittings
ASTM A815 S32205 Duplex 2205
Features:
- High mechanical strength
- Excellent corrosion resistance
- Good resistance against stress corrosion cracking
Applications:
- Offshore pipelines
- Subsea systems
- High pressure sour service applications
ASTM A815 S32750 Super Duplex 2507
Features:
- Superior corrosion resistance
- High strength
- Excellent chloride resistance
Used in:
- Deep offshore projects
- Severe sour environments
- Chemical processing systems
Product Range
GS Pipeline supplies complete NACE sour service fitting solutions.
Butt Weld Pipe Fittings
Long Radius Elbows
Available:
- 45° Elbow
- 90° Elbow
- Long Radius (LR)
- Short Radius (SR)
Applications:
- Pipeline direction change
- High pressure fluid systems
Equal Tee & Reducing Tee
Functions:
- Pipeline branch connection
- Flow distribution systems
Available:
- Equal Tee
- Reducing Tee
Concentric Reducers
Applications:
- Vertical pipeline transition
- Pump and equipment connections
Eccentric Reducers
Applications:
- Horizontal piping systems
- Pump suction pipelines
End Caps
Applications:
- Pipeline termination
- Pressure testing systems
Cross Fittings
Applications:
- Multi-direction pipeline connection
Socket Weld & Threaded Sour Fittings
Available products:
- Socket Weld Elbows
- Socket Weld Tees
- Socket Weld Couplings
- Threaded Elbows
- Threaded Tees
- Threaded Couplings
Suitable for:
- Small diameter high pressure piping
- Instrumentation systems
- Hydraulic systems
Size & Dimension Range
| Parameter | Range |
| Size | 1/2″ – 48″ |
| Schedule | SCH10 – SCH160 |
| Wall Thickness | XXS Available |
| Connection Type | Butt Weld / Socket Weld / Threaded |
| Manufacturing | Forged / Seamless Formed |
Manufacturing Process
1. Raw Material Control
All raw materials are supplied with:
- Heat number identification
- Chemical composition report
- Mechanical test certificates
2. Forming Process
Manufacturing methods include:
- Hot forming
- Cold forming
- Forging
to achieve uniform grain structure.
3. Heat Treatment
Processes include:
- Normalizing
- Solution annealing
- Quenching and tempering
Purpose:
- Improve toughness
- Reduce residual stress
- Enhance sour service performance
4. Machining & Finishing
Processes:
- Bevel machining
- Surface finishing
- Dimensional correction
5. Final Inspection
Each production batch undergoes:
- Dimensional inspection
- Hardness testing
- Non-destructive testing
- Pressure testing
Sour Service Testing & Inspection
GS Pipeline provides complete sour service documentation.
SSC Testing
Standard:
NACE TM0177
Purpose:
Verify resistance against sulfide stress cracking.
HIC Testing
Standard:
NACE TM0284
Purpose:
Evaluate hydrogen-induced cracking resistance.
PMI Inspection
Positive Material Identification ensures:
- Correct alloy grade
- Material authenticity
- Traceability
Non-Destructive Testing
Available:
- Ultrasonic Testing (UT)
- Magnetic Particle Testing (MT)
- Liquid Penetrant Testing (PT)
- Radiographic Testing (RT)
Pressure Testing
Available reports:
- Hydrostatic test report
- Pneumatic test report
Quality Documentation Package
Each sour service fitting order can include:
✔ Mill Test Certificate (MTR)
✔ EN10204 3.1 Certificate
✔ EN10204 3.2 Certificate
✔ Chemical Analysis Report
✔ Mechanical Test Report
✔ Hardness Test Report
✔ PMI Inspection Report
✔ SSC Test Report
✔ HIC Test Report
✔ Dimensional Inspection Report
✔ Material Traceability Report
Applications
Oil & Gas Industry
NACE sour fittings are used for:
- Sour crude pipelines
- Natural gas pipelines
- Wellhead systems
- Gathering pipelines
Refinery Industry
Applications:
- Hydrogen sulfide processing units
- Distillation systems
- High temperature piping
Petrochemical Industry
Used in:
- Chemical reactors
- Processing pipelines
- Corrosive fluid systems
Offshore Engineering
Applications:
- Offshore platforms
- Subsea pipelines
- Marine energy systems
Why Choose GS Pipeline Sour Service Fittings?
Professional Sour Service Manufacturing
GS Pipeline provides:
- International standard fittings
- NACE compliant materials
- Complete inspection documentation
- Global export experience
Reliable Quality Control
Advantages:
✔ NACE MR0175 / ISO 15156 compliance
✔ Full material traceability
✔ Controlled hardness
✔ SSC & HIC testing support
✔ Third-party inspection accepted
Global Project Supply
Serving customers in:
- North America
- Middle East
- Southeast Asia
- Europe
- Africa
- South America
Customized NACE Pipe Fittings
GS Pipeline supports customized manufacturing according to:
- Engineering drawings
- EPC specifications
- Pipeline project requirements
- Oilfield standards
Customization options:
- Special dimensions
- Large diameter fittings
- Special alloy materials
- Customized inspection plans
Frequently Asked Questions (FAQ)
What are NACE sour service pipe fittings?
NACE sour service pipe fittings are specially manufactured fittings designed for pipelines containing hydrogen sulfide (H₂S), complying with NACE MR0175 / ISO 15156 requirements.
Which standards apply to sour service fittings?
Common standards include:
- ASME B16.9
- ASME B16.11
- MSS SP-75
- NACE MR0175
- ISO 15156
What materials are suitable for sour gas applications?
Common materials include:
- A234 WPB NACE
- A403 WP316L NACE
- A815 Duplex 2205
- A815 Super Duplex 2507
Do you provide SSC and HIC testing?
Yes. GS Pipeline provides SSC and HIC laboratory test reports according to customer requirements.
Can you supply customized sour service fittings?
Yes. Custom sizes, materials, dimensions, and inspection requirements are available for EPC and oil & gas projects.
Request a Quote for NACE Sour Service Pipe Fittings
Looking for a reliable NACE MR0175 / ISO 15156 pipe fittings manufacturer?
Contact GS Pipeline for:
- Sour service material recommendations
- Technical consultation
- Project quotations
- Customized pipeline solutions
GS Pipeline – Professional Manufacturer of NACE Sour Service Pipe Fittings for Global Oil & Gas Projects.