Applications

Pipe fittings selection for every pipeline service

From large-bore oil & gas transmission to food & pharmaceutical cleanrooms — the recommended pipe fittings types, standards and materials for seven working conditions.

ASME/EN/GB/SH/GOST/JIS/KS

Application matrix

Seven application scenarios

Match your working condition to the recommended flange type, standard and material.

Oil and Gas Pipeline System

Large-bore pipelines for oil and gas transportation carry crude oil, natural gas and oil-gas mixtures. These media are flammable and explosive, imposing extremely high requirements on flange sealing performance and pressure bearing capacity.

Recommended type: Weld Neck Flanges (WN) for high-pressure lines · Slip-on Flanges (SO) for medium and low pressure services
Standard: ASME B16.5 / ASME B16.47
Sealing face: Ring Type Joint (RTJ) for Class600 and above · Raised Face (RF)
Material: A105 · stainless steel · NACE sulphide stress cracking resistant

Chemical Plant Process Piping System

It transports corrosive process fluids and imposes high requirements on material corrosion resistance and flange sealing performance. Multiple sets of Weld Neck Flanges (WN), stainless steel material, Raised Face (RF) sealing, fitted with metallic gaskets and high-strength bolts. Clear pipeline welds, suitable for corrosive media.

Recommended type: Stainless steel Weld Neck Flanges (WN)
Standard: ASME B16.5 / EN1092-1
Sealing face: Raised Face (RF) preferred · Male & Female (MFM) and Tongue & Groove (T&G) optional
Material: Stainless steel · metallic gaskets · high-strength bolts

Thermal Power Plant Piping System

High-temperature and high-pressure steam piping system, belonging to the main process pipeline network of power stations. Applicable for large-bore pressure pipelines equipped with Weld Neck Flanges (WN) and gate valves, used in high-temperature & high-pressure steam transmission lines.

Recommended type: Weld Neck Flanges (WN) with gate valves for large-bore pressure pipelines
Service: High-temperature & high-pressure steam transmission lines

Offshore Platform Piping System

Process piping on the deck of offshore vessels transports oil and gas media. Exposed to marine salt-spray corrosive environment with continuous vibration, it imposes stringent requirements on the corrosion resistance and anti-vibration sealing performance of flanges.

Recommended type: Weld Neck Flanges (WN) · Slip-on Flanges (SO)
Standard: ASME B16.5 / EN1092-1
Sealing face: Raised Face (RF) · Ring Type Joint (RTJ) optional for high pressure
Material: Heavy-duty anti-corrosion treatment
Certification: Classification societies such as DNV and LR

Industrial Plant High-Temperature Process Piping System

Large-bore high-temperature process pipelines transport hot steam or thermal process media. Thermal expansion and contraction occur during operation, which places high demands on the high-temperature resistance and sealing stability of flanges.

Recommended type: Weld Neck Flanges (WN) for high-temperature services
Standard: ASME B16.5 / EN1092-1
Sealing face: Raised Face (RF) · Ring Type Joint (RTJ) optional for high pressure & high temperature
Material: A105 · chromium-molybdenum steel

Food & Pharmaceutical Cleanroom Process Piping System

Stainless steel pipelines, flange assemblies and pressure gauges. Sanitary polished stainless steel piping with rubber gaskets for sealing. The pipelines have smooth surfaces without dead corners to meet hygiene requirements.

Recommended type: Slip-on Flanges (SO) · Plate Flanges (PL)
Standard: ASME B16.5 / EN1092-1
Sealing face: Raised Face (RF)
Finish: Polished finish, low surface roughness · CIP (Clean-in-Place)
Material: Stainless steel · rubber gaskets

Marine Engine Room Piping System

Large-bore pipelines, flanges, butterfly valves and pressure gauges. A large number of bolted flange connections serve as core components for marine piping. The conveyed media can be fuel oil, cooling water, compressed air, etc.

Recommended type: Weld Neck Flanges (WN) · Slip-on Flanges (SO)
Standard: ASME B16.5 · EN1092 · JIS
Sealing face: Raised Face (RF) primary · Ring Type Joint (RTJ) for partial high-pressure conditions
Service: Compact space with vibration · fuel oil, cooling water, compressed air
Certification: Classification society requirements

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