1. General
This technical specification and its attachments set out the minimum technical requirements of the Buyer for the standard orifice flowmeter required by Company X for the annual production of Project X.
The standard orifice flowmeter supplied by the Seller shall comply with the requirements of this technical specification, and any deviation must be approved in writing by the Buyer.
Compliance with the requirements of this technical specification does not relieve or release the Seller from any responsibility to provide a reliable standard orifice flowmeter.
2. Scope of Supply
The scope of supply of the Seller includes
(1) All instruments and their accessories.
(2) Special tools and materials for installation and maintenance (if any).
(3) Spare parts for start-up and spare parts required for two years of normal operation.
(4) Drawings and documents.
3. Applicable Standards
The standard orifice flowmeter provided by the seller shall meet the specified design conditions and be designed and manufactured in accordance with internationally recognized industrial standards and manufacturer standards.
The seller shall list the names of the adopted standards and specifications in the bid.
4. Technical requirements
4.1 The standard orifice flowmeter supplied by the seller shall meet the technical requirements of this technical specification (including attachments).
4.2 The supplied flowmeter shall contain the following instrument numbers:
Orifice number: FE
Transmitter number: FT
4.2 The standard orifice flowmeter system provided by the seller must be complete, without missing items, and assembled at the manufacturer, meeting the technical and use requirements; provide guaranteed test run, spare parts during the warranty period, and special tools for installation and maintenance. If there are any missing items or omissions, the seller must make up for them in a timely and free of charge.
4.3 The basic technical requirements for the standard orifice flowmeter provided by the seller are as follows:
The standard orifice flowmeter provided by the seller must be a domestic first-line brand with a good reputation.
The seller shall calculate and provide a suitable flowmeter based on the operating parameters provided by the buyer. The flowmeter shall be calibrated before leaving the factory and calibrated to the required accuracy.
The standard orifice flowmeter provided by the seller must be installed in full pipe.
The standard orifice flowmeter and differential pressure transmitter are installed and supplied as a whole, and the root valve and three-valve group are provided. The output signal of the differential pressure transmitter is 4~20mA DC+HART protocol.
The explosion-proof level of the differential pressure transmitter is EEx ibIICT4.
The protection level of the differential pressure transmitter is not less than IP65.
The differential pressure transmitter has local indication.
The overall accuracy of the standard orifice flowmeter is not less than 1%.
The standard orifice flowmeter provided by the seller should consider the hardening and wear-resistant treatment of the probe in an environment containing solid particle media.
The pressure taking method of the standard orifice flowmeter should adopt an annular chamber pressure taking and anti-blocking structure.
The instrument installed on site should be able to work in a humid and corrosive atmospheric environment, and copper and copper alloys shall not be used.
4.4 The instrument should be installed with a nameplate on the instrument body when it is supplied. The nameplate content includes: instrument position number, model, specifications, etc. The nameplate material should be stainless steel.
5. Quality assurance and performance guarantee requirements
The seller shall provide quality assurance and performance guarantee for the standard orifice flowmeter.
6. Technical Documents and Information Requirements
6.1 All documents and information provided by the Seller shall be in Chinese. The units of measurement shall be the International System of Units (SI).
6.2 Bidding Document Requirements
6.2.1 The bidding technical documents submitted by the Seller shall include the following contents:
(1) Overview
(2) Scope of Supply
(3) Detailed Specifications
The specifications shall be in accordance with the technical specifications and instrument data sheets in the inquiry technical documents.
(4) Technical Service Description
(5) Quality Assurance
(6) Document and Information Delivery
(7) Deviation Table
If there are any inconsistencies between the bidding technical documents and the requirements of this technical specification, the Seller shall list them one by one in the deviation table of the bidding technical documents.
(8) Qualification certificate
(9) Product samples and calculation sheets
(10) If external accessories are required, the accessory name, model, company name (brand), contact person
and mailing address should be listed item by item
6.2.2 The scope, number of copies and time of the technical documents and materials provided by the seller shall meet the requirements of the “Supplier Drawing and Material Requirements”.
7. Technical Services
The seller shall be able to provide the following technical services and give a separate quotation.
(1) On-site installation and adjustment technical services;
(2) Operation training technical services;
(3) Test run technical services;
8. Other related documents
Appendix 1: Instrument data sheet
9. Manufacturer requirements
The recommended manufacturers of orifice flowmeters are: