Wholesale China Drilling Industry Inspection Services Manufacturers Suppliers – Valve Inspection – EC

Short Description:


Product Detail

Product Tags

Related Video

Feedback (2)

With this motto in mind, we have turn out to be amongst probably the most technologically innovative, cost-efficient, and price-competitive manufacturers for Electric Water Heater Element Test , Electrical Testing Guidelines , Electrical Trade Test Preparation , We are now looking forward to even greater cooperation with overseas customers based on mutual benefits. If you are interested in any of our products, please feel free to contact us for more details.
Wholesale China Drilling Industry Inspection Services Manufacturers Suppliers – Valve Inspection – EC Detail:

I. Quality Requirement

The relevant requirements for valve quality have been set forth in standards.

①The chemical component and mechanical property of the valve’s main materials conform to requirements in relevant material standards.

②The shape and size error of the valve castings meet the regulations in drawings.

③The non-processed surface of the valve castings shall be flat, smooth and free from adhering sand, oxide skin, pore, sand inclusion, cracks or other defects. The typecasting sign shall be clear, and the sprue and riser shall keep in level with castings surface after cleaning.

④All valve parts shall be connected firmly and free from loose.

⑤The results of pressure test and sealing performance test for valve conform to requirements of relevant test standards.

⑥The valve operation shall be under nominal pressure and designated differential pressure, and starting and stopping valve shall be free from clamping.

⑦It has the certain operation times and service life.

⑧It’s featured by better flow capacity (meaning the pressure loss at valve is smaller after passing through it).
II. Test and Inspection Method

1、Castings Quality

The castings shape and size shall conform to the requirement of technical drawings and regulations from demander. The minimum wall thickness of valve parts, structural length error, abrasion displacement allowance of gate plate shall not lower than requirements in product technical standard and product drawings. The surface of rough valve and pressured shell of finished valve product shall be no cracks, cold shut, sand inclusion, pore and other defects. The adhering sand, sprue, riser and oxide skin on castings surface shall be cleaned off.

2、Pressure Test

The pressure test is the most basic test for valve. Each valve shall be carried out for pressure test before delivering from factory. The test pressure and time duration follow the regulation in GB/ T13927, and test items cover shell test and sealing test. If any of back sealing structure on valve, it’s required to conduct back seal test. During the test process, the external force that may affect test result shall not be applied to valve. The test pressure shall keep constant during the process of pressure holding and testing.

The shell test for valve is a kind of pressure test for whole valve shell connected by valve body and cover. Its purpose is to check the compactness between valve body and cover, namely the anti-pressure capacity of whole shell including connection of valve body and cover.

The sealing test is to check the performance of on-off parts and valve sealing pair, and can be divided into high-pressure liquid sealing test and low-pressure air sealing test.

What can EC offer you?

Economical: At half industrial price, enjoy rapid and professional inspection service in high efficiency

Extremely rapid service: Thanks to immediate scheduling, preliminary inspection conclusion of EC can be received on site after the inspection is completed, and formal inspection report from EC can be received within 1 workday; punctual shipment can be guaranteed.

Transparent supervision: Real-time feedback of inspectors; strict management of operation on site

Rigorous and honest: The professional teams of EC around the country offer professional services to you; independent, open and impartial incorrupt supervision team is set to inspect on-site inspection teams randomly and supervise on site.

Customized service: EC has service ability that goes through the whole product supply chain. We will provide tailored inspection service scheme for your specific demand, so as to solve your problems specifically, offer independent interaction platform and collect your suggestions and service feedback about the inspection team. In this way, you can participate in inspection team management. At the same time, for interactive technology exchange and communication, we will offer inspection training, quality management course and technology seminar for your demand and feedback.

EC Quality Team

International layout: superior QC covers domestic provinces and cities and 12 countries in Southeast Asia

Local services: local QC can provide professional inspection services immediately to save your travel expenses.

Professional team: the strict admittance mechanism and industrial skill training develop superior service team.


Product detail pictures:

Wholesale China Drilling Industry Inspection Services Manufacturers Suppliers –  Valve Inspection  – EC detail pictures


Related Product Guide:

We usually continually offer you the most conscientious consumer services, along with the widest variety of designs and styles with finest materials. These initiatives include the availability of customized designs with speed and dispatch for Wholesale China Drilling Industry Inspection Services Manufacturers Suppliers – Valve Inspection – EC , The product will supply to all over the world, such as: Kenya, Latvia, Ethiopia, Ought to any of these products be of curiosity to you, remember to allow us to know. We are going to be satisfied to give you a quotation on receipt of one's in depth specs. We've our private experienced R&D enginners to meet any of one's requriements, We appear forward to receiving your enquires soon'and hope to have the opportunity to work together with you in the future. Welcome to check out our company.
  • The supplier cooperation attitude is very good, encountered various problems, always willing to cooperate with us, to us as the real God.
    5 Stars By Deborah from Pretoria - 2017.07.07 13:00
    The sales manager has a good English level and skilled professional knowledge, we have a good communication. He is a warm and cheerful man, we have a pleasant cooperation and we became very good friends in private.
    5 Stars By John from Czech - 2017.08.15 12:36
    Write your message here and send it to us