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Company Overview

Zhejiang Dongchen Valve Technology Co., Ltd. (formerly Hangzhou Dongchen thermal auxiliary equipment Co., Ltd.) was established in 2006 and is located in Hangzhou City, around 130 miles southwestern of Shanghai. It designs and manufactures special valves, various high and medium pressure regulating valves, Desuperheater, steam turbine bypass valves, boiler feed water regulating valves, minimum flow valves, gate valves, ball valves, butterfly valves, globe valves, check valves, blowdown valves and other valves, as well as relevant steam turbine auxiliary equipment and boiler auxiliary equipment. The products are used in coal-fired thermal power units of various capacity levels, gas turbine cogeneration projects, oil refining, chemical industry, metallurgy, central heating, and other fields.

To steadily improve the quality of products, Dongchen has adopted strict industry standards. All products must pass comprehensive quality testing to ensure that they fully meet customers' strict requirements. Zhejiang Dongchen Valve Technology Co., Ltd. has passed ISO9001 and ISO14001 & 45001 certifications to ensure product quality and minimize environmental and health impact.

 

In response to the call for the digital transformation of the national manufacturing industry, as an early declared smart IOT factory enterprise, Zhejiang Dongchen has built PLM, ERP, smart logistics, production equipment crystal ball, and smart  IoT Kanban modules, realized integrated production, quality inspection and warehousing mode from order receiving to R & D and design, raw material procurement, production, and processing, opened a new digital production plant and office space of industrial valves and embarked on a new journey of Dongchen valves New manufacturing.

Quality Control

Valve quality control system, control link, control point schedule

 

 

Control Links

Points

Head

Control Categories

Inspection Category

Basis For Control

Work Testimonials

Material Parts Control System

1 purchase order

1) Procurement document approval (material technical conditions, standards, etc.).

Material Responsible Officer

And

 

Material and component control procedures

Material purchase orders

2) Confirmation of qualified suppliers

List of Qualified Suppliers

3) Purchase order

 

2 Accepted into the library

1) Quality certificate review certificate, technical documents

Material Responsible Officer

H

B

Material and component control procedures

Quality Certificate,

2) Supplement and re-examination,

Buyer Inspector

Certificate

3) Test report, audit, archive

 

Recheck the report

4) Physical inspection. (Appearance quality, material marking, model, specifications).

 

R

 

Real

5) Material code preparation and marking transplantation

 

R

B

Real

6) Material storage review

 

R

 

Shipping orders

3 Material storage

1) Partition storage

Class I welding consumables library warehouse manager, inspector

And

 

Material and component control procedures

Partition tags

2) Physical marking and confirmation

Physical markings

4 primary welding consumable library

1) Batch number, quantity specifications

Warehouse warehouse administrator

And

 

Welding control procedures

Physical objects, material accounts

2) Stacking requirements

Inspector

Tags, records

3) Temperature and humidity control

   

5 Material substitutes

1) Material substitution list approval 1 reasonableness 2 approval procedures

Materials, process, welding quality engineer, design review

R

B

Material substitution management specifications

Material substitute list

6 Material distribution

1) Physical review (specification, surface quality).

Warehouse warehouse manager for responsibility

R

B

Identification and traceability control procedures

 

2) Material code marking and mark transplantation

Inspector

R

B

Real

7Use of materials

1) Material re-inspection

Operator, inspector

And

 

Identification and traceability control procedures

Real

2) Review before use

3) Label transplantation when unloading

 

R

B

8 Pressure element subcontracting

1) Subcontractor evaluation

Material Responsible Officer

R

 

Material and component control procedures

Subcontracting protocols

2) Quality control of subcontracted projects

3) Subcontracted pressure components back to the company for inspection

Non-Destructive Testing Control System

1 Accept the task

Accept the delegate

Client, inspector

And

 

Non-destructive testing control

Delegate orders

2 Preparation before non-destructive testing

1) Personnel qualifications

Non-destructive responsible personnel

R

 

Non-destructive testing control

Personnel training

2) Inspection instruments and equipment calibration regular inspection

Non-destructive responsible personnel

And

 

Non-destructive testing control

Certificate of authentication

3) Non-destructive testing process preparation

Non-destructive responsible personnel

And

 

Non-destructive testing control

Non-destructive process

4) Testing scheme

Non-destructive responsible personnel

And

 

Non-destructive testing control

Process solutions

5) Detect the status of the object

Non-destructive responsible personnel

And

 

Non-destructive testing control

Real

3 non-destructive testing implementation control links

1) Preliminary investigation 1 Detection parameter 2 negative film quality

Non-destructive responsible personnel, flaw detectors

R

B

Non-destructive testing control

Inspection records

2) Re-inspection and expansion control points, re-inspection results, expansion ratio

4 Reports are issued

1) Preparation of reports

Full-time flaw detector

R

B

Non-destructive testing control

report

2) Audit of reports

Non-destructive responsible personnel

R

B

Non-destructive testing control

Detection report

5 subcontracts

1) Subcontractor evaluation

Non-destructive responsible personnel

R

 

Non-destructive testing control

Evaluation form

2) Quality control of subcontracted projects

Non-destructive responsible personnel

R

 

Non-destructive testing control

agreement

3) Subcontract the project back to the company for data review

Non-destructive responsible personnel

R

 

Non-destructive testing control

agreement

Pressure Test Control System

1 Pressure test preparation

1) Pressure test process document preparation and review

Person responsible for the test

H

A

Pressure test control

Test process card

2) Pressure test equipment site

Process Technology Department

   

3) Product integrity inspection, completion data inspection

Person responsible for the test

Pressure test control

Physical, inspection records

2 Pressure test implementation

1) Pressure gauge check 1 pressure gauge number 2 range 3 verification identification

Person responsible for the test

Metering control

Verification records

2) Pressure test 1 test pressure 2 packing time

Person responsible for the test

Test control

Test inspection records

3) The pressure test check has no leakage and no leakage, no obvious deformation of the tank, and no abnormal noise during the pressure test process

Person responsible for the test

Test control

Test inspection records

3 after pressure test

1) Pressure test report 1 original record 2 test report 3 supervision unit confirmation

Person responsible for the test

Pressure test control

Trial report

Inspection Control System

1 Inspection preparation control link

1) Measuring instruments, gauge samples

Measurement of responsible personnel

And

 

Inspection control

Verify the identity

2) Inspection process

Inspection technician

And

 

Inspection control

Inspection process

3) Inspection and testing methods

Inspector

And

 

Inspection control

craft

2 Manufacturing process inspection (process inspection).

1) Line the line of material

Inspector of the person responsible for inspection

H

 

Inspection control

Real

2) Scribble the holes

     

Inspection control

Real

3) Marker transplantation: identification of markers and transplant sites

 

R

B

Inspection control

Physical objects, marks

4) Longitudinal seam, ring seam welding welded joint surface quality

 

R

 

Identification and traceability control procedures

Welding quality inspection records

5) Assemble weld arrangement, appearance geometry

 

R

 

Inspection control

Recording

6 head shape deviation

 

R

B

Inspection control

Test board test record

7) Disposal of non-conforming products

Inspection responsible personnel

R

 

Inspection control

Appearance records

3 Inspection and testing data

1) Product nameplate

Inspection responsible personnel

R

 

Inspection control

Make a steel stamp

2) Archive materials

Inspection responsible personnel

R

 

Inspection control

Quality records

3) Product safety and quality technical data

Inspection responsible personnel

R

B

Inspection control

Product quality certificate

Physical And Chemical Inspection Control System

1 Specimen verification

1) Physical verification

Physical and chemical responsible personnel

And

 

Physicochemical control

sample

2) Acceptance of specimens, marking, quantity, dimensional accuracy

Client, inspector

And

 

Physicochemical control

sample

2 Test preparation

1) Personnel qualifications

Physical and chemical responsible personnel

And

 

Physicochemical control

Training records

2) Regular inspection of instruments and equipment

Measurement of responsible personnel

And

 

Physicochemical control

Verification records

3) Method selection

Physical and chemical responsible personnel

And

 

Physicochemical control

Process specifications

3 test process

1) Data Department: Rationalize the original data records and repeat the test regulations

Physical and chemical responsible personnel

R

 

Physicochemical control

Calculation results report

4 test reports

1) Issuance of reports

Physical and chemical responsible personnel

R

 

Physicochemical control

Trial report

2) The qualified subcontractor submits the test report

Physical and chemical responsible personnel

R

 

Physicochemical control

Trial report

Metering Control System

1 measurement management control link

1) Leadership responsibilities

Measurement of responsible personnel

And

 

Metering control

Responsibility

2) Governing bodies

Measurement of responsible personnel

And

 

Metering control

Institutional organization

3) Metering management documents

Measurement of responsible personnel

And

 

Metering control

Record the file

4) Personnel quality

Measurement of responsible personnel

And

 

Metering control

Training records

5) Unit of measurement

Measurement of responsible personnel

And

 

Metering control

 

2 measuring instruments equipped with measurement testing and control links

1) Measuring instruments equipped

Measurement of responsible personnel

And

 

Metering control

Register the account

2) Measurement testing

Measurement of responsible personnel

And

 

Metering control

Real

3) Traceability of quantity and value

Measurement of responsible personnel

And

 

Cycle verification

Verification records

3 Metrology verification

1) Maintenance and use of measuring instruments

Full-time metrologian

And

 

Metering control

Verification records

2) Measurement verification

Full-time metrologian

And

 

Metering control

Verification report

3) Logo management

Measurement of responsible personnel

And

 

Metering control

Verify the mark

4) Disposal of unqualified measuring instruments

Measurement of responsible personnel

And

 

Metering control

 

4 Record file control links

1) Metering records and archives

Measurement responsible personnel, measuring personnel

And

 

File and record control

Register of measuring instruments

5 Environmental condition control

1) Metrology verification (calibration) and detection of environmental conditions

Measurement of responsible personnel

And

 

Metering control

Metrology room work system

Welding Control System

1. Welder management

1) Welder training

Welding responsible personnel

And

 

Weld control

Training records

2) Welder exam

Welding responsible personnel

And

 

Weld control

Welder profile

3) Certified management of welders

Welding responsible personnel

And

 

Weld control

Welder certificate, certified welder form

4) Welder performance appraisal and welder file management

Welding responsible personnel

And

 

Weld control

Welder profile

2. Welding equipment management

1) Equipment resource conditions

Equipment Responsible Personnel

And

 

Device control

Device ledger

2) Procurement of welding equipment

Equipment Responsible Personnel

And

 

Device control

Procurement planning

3) The equipment is in good condition

Equipment Responsible Personnel

And

 

Metering control

Turnaround plan

4) Weekly inspection of welding instruments

Measurement of responsible personnel

And

 

Metering control

Verify the mark

3. Welding consumables management, grade II welding consumables library management

1) Welding consumables procurement

Material Responsible Officer

H

B

Material and component control procedures

Procurement planning

2) Welding consumables acceptance, welding consumables quality certificate

Inspection responsible personnel

   

Certificate of quality

3) Welding consumables re-inspection, welding consumables re-inspection report

Inspection responsible personnel

   

Recheck the report

4) Storage of welding consumables

Level II solder library warehouse administrator

And

 

Weld control

Field LEVEL II library

5) Drying of welding consumables

Level II solder library warehouse administrator

And

 

Weld control

Drying records

6) Constant temperature storage of welding consumables

Level II solder library warehouse administrator

And

 

Weld control

Solder consumables ledger

7) Welding consumables distribution and recycling

Level II solder library warehouse administrator

And

 

Weld control

Release recycling records

4. Welding process evaluation

1) Welding performance test

Welding responsible personnel

H

A

Weld control

Trial report

2) Welding process guide draft

     

Weld control

Welding process evaluation report

3) Welding process evaluation test

     

Weld control

Trial report

4) Welding process assessment report, approved by quality assurance engineer

     

Weld control

Welding process evaluation report

5. Welding process management

1) Welding process document preparation, proofreading

Welding responsible personnel, craftsmen

And

 

Weld control

Welding process

2) Welding process changes

 

And

 

Weld control

Change order

3) The welding process is implemented

 

And

 

Weld control

Welding process

6. Product welding management

1) Welder Qualification, Welder Stamp,

Welding responsible personnel

R

B

Weld control

Documents, physical markings

2) Welding environment

Welding responsible personnel

R

 

Weld control

workshop

3) Welding process discipline

Welding responsible personnel

R

 

Weld control

Craft Discipline Checklist

4) Welding process

Welding responsible personnel

R

 

Weld control

Soldering process recording card

5) Welding inspection

Inspector

R

B

Weld control

Inspection records

7. Product welding test board

1) Specimen preparation: quantity, position, welding process, stamp

Welding responsible personnel

H

A

Weld control

Product test plate welding records

2) Physical and chemical test: mechanical property test report

     

Weld control

Trial report

8. Welding rework

1) Welding primary and secondary rework, super rework

The person responsible for welding

R

 

Weld control

Rework report

2 Re-inspection after repair

 

R

 

Weld control

Rework report

Operational Process Control System

1. Process preparation control link

1) The process audit of the drawing

Process responsible personnel, process personnel

And

 

Process control

Audit record cards

2) Compilation and review of process plans

     

Process control

Craft cards

3) Compilation and review of process documents

     

Process control

Process card

4) General process rules and regulations

     

Process control

Process Code

5) Editing and review of material process quotas

     

Process control

List of material quotas

2. Process implementation quality control link

1) Process discipline and supervision, process discipline implementation, quality situation

Process responsible personnel, process technicians

R

 

Process control

Process Discipline Checklist

2) Process changes

     

Process control

Change order

3) Process submission: product characteristics, process, technical requirements, quality standards, safety measures

     

Process control

Craft cards

3. Tooling design quality control link

1) Tooling design advanced structure, reliability, applicability

Process technician

And

 

Process control

Tooling design drawings

2) Tooling drawing

Process responsible personnel

And

 

Process control

Tooling design drawings

3) Tooling verification, inspection and acceptance, manufacturing quality

Process responsible personnel

And

 

Process control

Tooling registration

Heat Treatment Control System

1 Heat treatment process preparation

1) Heat treatment process preparation, review

Persons responsible for heat treatment

And

 

Heat treatment control

Heat treatment process

2) Heat treatment process modification

Persons responsible for heat treatment

2 Heat treatment preparation

1) Heat treatment equipment

Equipment Responsible Personnel

And

 

Device control

Well equipped

2) Measuring instrument

Measurement of responsible personnel

And

 

Metering control

Verify the mark

3) Thermocouple calibration, temperature measurement point arrangement

Measurement of responsible personnel

And

 

Metering control

Verify the mark

3 Heat treatment process

1) Post-weld heat treatment

Persons responsible for heat treatment

R

 

Heat treatment control

Time temperature graph

2) Time temperature curve

Heat treatment technicians

4 heat treatment reports

Heat treatment report, heat treatment record

Persons responsible for heat treatment

R

B

Heat treatment control

Heat treatment reports, records

Inspector

Equipment Control System

1 equipment planning, selection and installation and commissioning control links

1) Equipment planning, equipment selection

Equipment Responsible Personnel

And

 

Device control

Equipment purchase planning

2) Accounting and filing

Equipment Responsible Personnel

And

 

Device control

Ledger

3) Equipment installation and commissioning

Equipment technicians

And

 

Device control

Recording

2 Equipment use and maintenance

1) Equipment use: special use of fixed machine, equipment identification

Equipment technicians

And

 

Device control

logotype

2) Equipment maintenance, regular maintenance 1 complete appearance is intact 2 cleaning, lubrication, fastening, anti-corrosion 3 equipment capabilities

operator

And

 

Device control

equipment

3) Equipment overhaul, maintenance plan, maintenance records

Equipment technicians

And

 

Device control

Plan, record

3 Equipment accidents and scrap

1) Equipment accidents

Equipment Responsible Personnel

And

 

Device control

Accident reports

2) Equipment scrapping

Equipment Responsible Personnel

And

 

Device control

Scrap orders

Design Control Systems

1 Design conditions

1) Review the design license category and level

Design responsible person

H

A

Design control

Review records

2) Issue a design task statement

Head of Design

And

 

Design control

Mission statement

3) Review of design conditions

Design responsible person

And

 

Design control

Conditional diagram

4) Compile design numbers

Archivist

And

 

Design control

Recording

5) Identify the designer

Design responsible person

And

 

Design control

Mission statement

2 scheme design control

1) Collect relevant information

Design responsible person

And

 

Design control

information

2) Organizational structure review

Design responsible person

And

 

Design control

Review records

3) Modify and improve the design scheme

Designers

And

 

Design control

Scenario diagram

4) Preliminary stage design

Designers

And

 

Design control

plan

3 Design controls

1) Design

Designers

And

 

Design control

plan

2) Preparation of design documents

Designers

And

 

Design control

plan

3) Proofread the design documents and fill in the proofreading records

Proofreading and auditing personnel

R

 

Design control

Proofreading records

4) Standardization review

Standardized auditors

R

 

Design control

Proofreading records

5) Design quality assessment

Auditors

R

 

Design control

Rating records

6) Design data archiving

Archivist

R

 

Design control

Archive

7) Stamp with design qualification stamp

Design responsible person

R

 

Design control

Working with records

4 design drawings foreign production drawings

1) Design qualifications

Design responsible person

H

A

Supervision and inspection outline

Review records

2) Design category, design level

3) Implementation of standards and integrity

4) Design changes

5 Information feedback

Handle feedback issues

Design responsible person

R

 

Design control

Design return visit records

6 Data Archiving

Design file archiving, complete and complete six books of documents, design drawing standard specifications

Data Manager

And

 

Design control

Archive

File Control System

1. Receipt, classification, custody and issuance of foreign documents

1) Reception and classification of foreign documents

Standardized responsible personnel

R

 

File control

File sending and receiving ledgers

2) Custody and issuance of foreign documents

Standardized responsible personnel

R

 

File control

Documents, sending and receiving records

2. Preparation, counter-signing and approval of internal documents

1) Preparation of internal documents

Responsible personnel of each department

R

 

File control

Documents, sending and receiving records

2) Countersigning and approval of internal documents

Responsible personnel of each department

R

 

File control

 

3) Custody and issuance of internal documents

Responsible personnel of each department

R

 

File control

 

3. Manufacturing, installation, transformation and maintenance records

1) Fill in, confirm and archive the process records

Production and inspection responsible personnel

R

 

File control

Procedure forms

2) Process record storage and retention period

Production and inspection responsible personnel

R

 

File control

 

4. The validity of the file version

The controlled documents and record forms used by the relevant departments and personnel for the implementation of the quality assurance system shall be valid versions

Standardized responsible personnel

R

 

File control

Valid version files

Contract Control

1. Contract review

1. Contract review

Contractually responsible personnel

And

 

Contract control

Contract review records

2. Sales contract signed

Contractually responsible personnel

And

 

Contract control

Contract management ledger

2. Contract control

3. Contract control

Contractually responsible personnel

R

 

Contract control

Contract change record

Nonconformance Control

1. Record, identify, store and isolate

1) Records and identification of nonconforming products or items

Production and inspection responsible personnel

R

 

Non-conforming products

control

Records and scenes

2) Storage and isolation of non-conforming products or items

Production and inspection responsible personnel

R

 

scene

2. Cause analysis, disposal and inspection

1) Cause analysis

Process responsible personnel

R

   

Review and disposal of nonconforming products

2) Formulation, review, approval and implementation of corrective plans

Process responsible personnel

R

   

Corrective solutions

3) Reuse re-inspection

Process responsible personnel

R

   

Recycling orders

3. Thorough disposal of scrap items

Validation of thoroughly scrapped items

Process responsible personnel

R

   

Scrap orders

 

Note: Class A Supervision Point Class B Supervision Inspection Point H Stop Point R Management Point E Checkpoint

 

Certificates

Quality Management System Certificate

Quality Management System Certificate

Description

Design, Development and Production of A1 temperature & Pressure reducing Devises, Control valve, Ball Valve, Gate valve, Globe Valve and Check valves within the scope of Qualification

Environmental Management System Certificate

Environmental Management System Certificate

Description

Design, development and Production of A1 Temperature & pressure Reducing Devises, Control Valves, Ball Valves, Butterfly Valves, Gate Valves, Globe Valves, and Check Valves within the scope of Qualification and Related management Activities

Occupational Health and Safety Management System Certificate

Occupational Health and Safety Management System Certificate

Description

Design, Development and Production of A1 Temperature & Pressure Reducing Devises, Control Valves, Ball valves, Butterfly Valves, Gate Valves, Globe Valves and check Valves within the scope of Qualification and Related Management Activities.

Certificate of Compliance

Certificate of Compliance

Description

API standard 607, Seventh Edition, June 2016. Qualified Range of Test valve: 4" DC5623-300lb Ball Valve, Qualified Pressure Rating 300,400.600.(According to API 607 table5) Qualified Sizes (NPS) 4" 6" 8"( According to API607 table3) Qualified Marking: Qualified Valve Shall be Permanently marketed, (According to API 607 Para7)

Certificate of Compliance

Certificate of Compliance

Description

API standard 607, Seventh Edition, June 2016. Qualified Range of Test Valve: 8" DC5623-300lb Ball Valve, Qualified Pressure Rating 300,400.600.(According to API 607 table5) Qualified Sizes (NPS) > 8"( According to API607 table3) Qualified Marking: Qualified Valve Shall be Permanently marketed, (According to API 607 Para7)

Certificate of Compliance

Certificate of Compliance

Description

API standard 607, Seventh Edition, June 2016. Qualified Range of Test valve: 2" DC5623-300lb Ball Valve, Qualified Pressure Rating 300,400.600.(According to API 607 table5) Qualified Sizes (NPS)

Certificate of Compliance

Certificate of Compliance

Description

API standard 6FA, Forth Edition, June 2018. Qualified Range of Test Valve: 4" DC5812-300lb Butterfly Valve, Qualified Pressure Rating 300,400.600.(According to API 6FA table3) Qualified Sizes (NPS)

Certificate of Compliance

Certificate of Compliance

Description

API standard 6FA, Forth Edition, June 2018. Qualified Range of Test Valve: 8" DC5812-300LB Butterfly Valve, Qualified Pressure Rating 300,400.600.(According to API 6FA table3) Qualified Sizes (NPS) > 8"( According to API6FA table2) Qualified Marking: Qualified Valve Shall be Permanently marketed, (According to API 6FA Para7)

Certificate of Compliance

Certificate of Compliance

Description

API Standard 6FA, Forth Edition, June 2018. Qualified Range of Test Valve: 2" DC5812-300LB Butterfly Valve, Qualified Pressure Rating 300,400.600.(According to API 6FA table3) Qualified Sizes (NPS)

Certificate of Compliance

Certificate of Compliance

Description

GLOBE CONTROL VALVE DC1621-CL600 NPS8 Performance Class ISO FE AH-CO1-SSA-1(-29C--425C)-CL600-ISO15848-1. Pressure Qualified, Stem Size Qualified, Valve Material: Body/Bonnet: WCB, Stem: ASM A564 17-4PH Stem Packing: Flexible graphite

Functional safety certificate

Functional safety certificate

Description

Gate Valve DC6011,DC6012 has been assessed per the relevant requirements of IEC 61508 PARTS 1-2 AND 4-7: 2010

Functional safety certificate

Functional safety certificate

Description

Ball Valve DC5621, DC5622, DC5623, DC5624,DC5631. has been assessed per the relevant requirements of IEC 61508 PARTS 1-2 AND 4-7: 2010 Safety Function: The Ball valve will move to the designed safe position when de-designed/energized within the specified safety time. Application Restrictions: The unit must be property designed into a safety instrumental function per the safety manual requirements. It is suitable to be safety function according to the description and the configuration.

Functional safety certificate

Functional safety certificate

Description

Butterfly Valve DC5811,DC5812, has been assessed per the relevant requirements of IEC 61508 PARTS 1-2 AND 4-7: 2010 Safety Function: The Butterfly valve will move to the designed safe position when de-designed/energized within the specified safety time. Application Restrictions: The unit must be property designed into a safety instrumental function per the safety manual requirements. It is suitable to be safety function according to the description and the configuration.

Functional safety certificate

Functional safety certificate

Description

Control Valve DC1611,DC1621(M),DC1624(9),DC1624(9)L/X,DC1624(9)D/E/M,DC1811,DC1821(M),DC1824(9),DC1824(9)L/X,DC1824(9)D/E/M,DC1920,DC1930 has been assessed per the relevant requirements of IEC 61508 PARTS 1-2 AND 4-7: 2010 Safety Function: The Control valve will move to the designed safe position when de-designed/energized within the specified safety time. Application Restrictions: The unit must be property designed into a safety instrumental function per the safety manual requirements. It is suitable to be safety function according to the description and the configuration.

Certificate of Compliance

Certificate of Compliance

Description

Gate Valve 4" DC6012-300LB, API STANDARD 6FA, FORTH EDITION, JUNE 2018 Qualified Pressure Rating(Class): 300,400,600.(According to API 6FA table3) Qualified Sizes(NPS):

Certificate of Compliance

Certificate of Compliance

Description

Gate Valve 8" DC6012-300LB, API STANDARD 6FA, FORTH EDITION, JUNE 2018 Qualified Pressure Rating(Class): 300,400,600.(According to API 6FA table3) Qualified Sizes(NPS):>8"(According to API 6FA Table 2) Valve Material: ASTM A216 WCB Qualified valves shall be permanently marketed: (according to API 6FA Para.7)

Certificate of Compliance

Certificate of Compliance

Description

Gate Valve 2" DC6012-300LB, API STANDARD 6FA, FORTH EDITION, JUNE 2018 Qualified Pressure Rating(Class): 300,400,600.(According to API 6FA table3) Qualified Sizes(NPS):


Company Information

Business Type Manufacturer
Company Zhejiang DongChen Valve Technology CO., Ltd
Main Products Ball Valves, Butterfly Valves, Gate Valves, Globe Valves and Control Valves, Desuperheater
Website www.docnvalve.com
Established Year 2006
City / State Hangzhou , Zhejiang
Country China
Address No.101, Qihang Road ,Renhe Street, Yuhang District

Factory Information

Location No.101, Qihang Road, Renhe Street, Yuhang District, Hangzhou City
Factory Size 10,000 square meters
Total QC Staff 5
Total RND Staff 14
Number of Production Lines 4
Annual output 100 M RMB
Average Lead Time 2 Months

Trading Information

Total Revenue 100 million RMB
Export Percentage 10%
Nearest Port Shanghai / Ningbo
Overseas Office Karachi, Pakistan

FAQ's

30% deposit, the remaining balance must be pay off before we deliver the goods to seaport
Hangzhou City, China
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