HAINER STEEL INDUSTRIAL CO.,LTD                                                              

Products: ASTM , JIS, BS, Seamless Pipes/Tubes,Pipe Fittings ( Elbow,Tee, Reduce) Steel Sheets,Boiler & Heat Exchanger Tube ...

Materials: 904L,2205,310S,316L,316Ti,F321,317L,347H,304L,17-4PH,17-7PH,Inconel 625, 825 ...

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Wenzhou Zhongyuan Steel Industrial Co.,Ltd Quality Control

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HAINEAR STEE INDUSTRIAL CO.,LTD had a series of testing to controal the quality all products before packing and delivery

Like Stainless Steel Seamless Pipes,we have main 3 parties inspection test plain ( ITP )



Part 1:For the raw material (Round Bars And Pipe Billet - For Seamelss Pipe Only),

we have two parties to test the quality



A: Test Of Chemical Compositioin

B: Test Of Mechanical Properties

    This test included

     -- Yield Strength Rt 0.5 M Pa ( Psi ), Mini requirements

     -- Tensile Strength Rm M Pa ( Psi ), Min requirements

     -- Elongation ( % ), Min requirements


Part 2: During production pipes,we have kinds of testing to control the quality,

The test included (Both Seamless And Welded Pipes)



-- Pipe surface both outside and inside

-- Tolerance of OD,W.T

-- Size ( Outside diameter, Wall thickness, Length )

-- Chemical Composition

-- Mechanical Properties



If pipe is stainless steel welded pipe,wel also have additional inspection


-- Online Ultrasonic Inspection

-- Visual Inspection For Outside Seaml ( times )

-- Visual Inspection For Inside Seam ( times )

-- X-Ray Inspection For Welding Seam



Part 3: Final Production of pipes,we have below testings in order to reach the quality meet to buyer's requirements



-- Test Of Pipe Body ( Both Seamless And Welded Pipes )



1.Yield Strength (M pa),Min requirements   

2. Tensile Strength (M pa),Min requirements  

3. Elongation (%),Min requirements   

4. Hydro-static or Nondestructive Electric Test   

5. IGC (Inter-Granular Corrosion Test)   

6. Ultrasonic Test (If buyer requested)   

7. Eddy Current Test (If buyer requested)

If the pipe is welded pipe,we also need to test welded seam both Tensile Strength and Yield Strength mini requirements


  • Standard:ISO 9001:2000


    Issue Date:2012-12-28

    Expiry Date:2015-12-27

    Scope/Range:The Quality Management System Applies In the Following Area: Production And Service Of Stainless Steel Tube,Valve&Pipe Fittings

    Issued By:China Quality Certification Center

  • Standard:IGC TEST Certificate-SMLS Pipe


    Issue Date:2012-07-17

    Expiry Date:2015-07-16

    Scope/Range:Inter-Granular Corrosion Test According To ASTM A-262 Practice E For Stainless Steel Pipe

    Issued By:Center For Quality Testing Of Stainless Steel Products,Z.J Province Of China

  • Standard:CCPIT Certificate


    Issue Date:2013-06-17

    Expiry Date:2016-06-16

    Scope/Range:Certify Kinds Of Commercial Invoice: SS Pipe, SS Plates/Coils/, SS Pipe Fittings ect.

    Issued By:China Council For The Promotion Of International Trade China Chamber Of International Commerce

  • Standard:MTC EN 10204:2004/3.1 ASTM A312 TP304/304L SMLS Pipe


    Issue Date:2013-05-23

    Expiry Date:2016-05-22

    Scope/Range:ASTM A312 Stainless Steel Seamless&Welded Pipe

    Issued By:Wenzhou Zhongyuan Steel Industrial Co,.Ltd / SGS / BV

  • Standard:MTC EN10204:2004/3.1 ASTM A312 TP316/316L SMLS Pipe


    Issue Date:2013-05-23

    Expiry Date:2016-05-22

    Scope/Range:ASTM A312 Seamless&Welded Stainless Steel Pipe

    Issued By:SGS / BV / Wenzhou Zhongyuan Steel Industrial Co,.Ltd



    Issue Date:2014-11-01

    Expiry Date:2017-10-31

    Scope/Range:ASTM A240A Stainless Steel Pipe/Sheets/Coils

    Issued By:Wenzhou Zhongyuan Steel Industrial Co,.Ltd

Contact Details
Wenzhou Zhongyuan Steel Industrial Co.,Ltd

Contact Person: Mr. Mark Fuel

Tel: 86-577-8895-9737

Fax: 86-577-8895-9771

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