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Professional Pipeline Inspection Services For Dual Plate Check Valve 

Good quality Third Party Inspection Services for sales
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Professional Pipeline Inspection Services For Dual Plate Check Valve 

China Professional Pipeline Inspection Services For Dual Plate Check Valve  supplier
Professional Pipeline Inspection Services For Dual Plate Check Valve  supplier Professional Pipeline Inspection Services For Dual Plate Check Valve  supplier Professional Pipeline Inspection Services For Dual Plate Check Valve  supplier Professional Pipeline Inspection Services For Dual Plate Check Valve  supplier

Large Image :  Professional Pipeline Inspection Services For Dual Plate Check Valve 

Product Details:

Place of Origin: China
Brand Name: INF inspection
Certification: ASNT/ CWI/ NACE/ ARAMCO
Model Number: pipeline inspection services

Payment & Shipping Terms:

Minimum Order Quantity: 1 man-day
Price: negotiable
Packaging Details: as per requirement
Delivery Time: on call
Payment Terms: T/T, Western Union, MoneyGram
Supply Ability: Inspection,Lab Test,NDE,Sourcing
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Detailed Product Description
Coverage Area: All Area In China Inspection Arrangement: Within 1 Day
Inspection Report: English Report Personnel Qualification: ASNT, CWI, CISWIP, NACE, Aramco
Discount: Available For Long Project Optional Service: Expediting, Factory Audit
Standard: API 598, API 6D, API 594

Professional pipeline inspection services for dual plate check valve with experienced inspector on call

-7/24 customer service

-Inspection notification can be responsed within 24 hours.

-Inspection report within 48 hours.

-Urgent inspection during holiday and weekend available.

-Critical issues will be reported real time.

-Local inspector attend the factory within 1 day.


INF have rich inspection experiences of quality control inspection services for many international mega projects, and our QC team performed inspection/ audit/ type approval for many factories with different products in china. We are familar with the normal defects and will help customer on defect sorting and removal.


Our Price:

1. Please include following information in your inquiry: your company name, project background, product type, applicable standard/specification, inspection date, duration, number of inspectors, factory's location.

2. Normally we will provide all-inclusive price including inspection fee, travel and hotel fee, etc. for third party inspection services.


1. Product

The dual Plate Check Valve is an all purpose non return valve that is much stronger, lighter in weight and smaller in size compared to a conventional swing check valve or life check valve.

The Dual Plate Check Valve design is the result of attempts to solve the problems associated with swing check valve and lift check valve. The Dual Plate Check Valve employs two spring-loaded plates hinged on a central hinge pin.
When the flow decreases, the plates close by torsion spring action without requiring reverse flow. This design offers the twin advantages of No Water Hammer and Non Slam simultaneously. All features put together make the Dual Plate Check Valve one of the most efficient design. It is also referred as SILENT CHECK VALVE.


2. Why use INF pipeline inspection services

Any failure of the valve will cause serious consequence like fluid leakage, pollution, fire, or even safety accident. Thus third party inspection services for valve is very important. To understand various related standards and project specifications, rich knowledge and experience is required for third party inspection services.

INF have provided pipeline inspection services to many leading oil company, EPC and trading agent, such as:KNPC, Shell, TR, GE, Exxonmobil, Samsung and so on.


3. Common defect of valve products


hydro test leakage, gas leakage, fire test leakage, low temperature test leakage
welding crack:

incorrect PWHT procedure, WPS&PQR
wall thickness below standard:

incorrect dimension below standard
casting cold shot, shinkage, hole:

defect reflected by UT, RT, MT or PT test
coating thickness:

pull off test sagging, peeling, thickness, anti-corrosion failure
high torque:

not convinient for job site to operate, mismatching with the actuator
failure of NDE test:

failure of mechnical test:

tensile test, hardness test, impact test
sealing surface damage:

damage of sealing ring, seat ring, ball, wedge


4. Inspection items for pipeline inspection services

During our pipeline inspection services, the inspector will carefully survey all critical manufacturing steps, and perform inspection items as customer request, like welding inspection, mechnical property, chemical composition check, dimension inspection, hardness test, pressure test, low temperature test, documents review and all requested inspection activities.



Gate/Globe/Check Valve
Ball Valve
Butterfly Valve
ON-OFF valve
Safety Valve
Plug Valve



Pre-Shipment Inspection (PSI)
Production Monitoring (PM)
During Production Check (DUPRO)
Initial Production Check (IPC)
Lab test witness
Supplier Audit




Daily, weekly, monthly or per customer requirement


English report or per customer request


Report will be submitted within 48 hour after inspection finished



5. Our advantages

To ensure the quality and compliance of the valve to customers, INF provide professional pipeline inspection services, all quality assurance inspector are with at least 5 years related working experiences and all requested qualification like NDE, ASNT. 

Our pipeline inspection services network cover most area of china, inspector can attend the inspection upon customer's notification within 24 hours.


Professional pipeline inspection services team:

-At least 5 years working experiences in industry QC field

-Personal Qualification as required

-English speaking and writing skill




Contact Details
INF Inspection Technology Co.,Ltd

Contact Person: sales

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