GB 6479-2000
Seamless Steel Pipes for High Pressure Fertilizer Equipment Manufacture and Delivery State
This standard deals with the seamless steel pipes that are used in high pressure fertilizer equipment, specifying the requirements and delivery states of the pipes.
1. Scope
This standard specifies requirements and delivery states of seamless steel tubes used in high pressure fertilization equipment, chemical engineering and stainless steel chemical equipment.
2. Normative references
The following documents are essential for the application of this standard:
a) GB 222;
b) GB 699;
c) GB 700 and
d) GB/T 8163-1992.
3. Terms and definitions
For the purposes of this standard, the following standards apply:
a) Delivery State: stipulates the conditions of delivery for steel pipe, from the manufacturer to customer.
b) Steel Pipe: is a long, hollow shaped metal pipe produced by either hot or cold rolling.
c) Rolled steel pipe: is produced by rolling a piece of hot-rolled steel on a rolling machine, producing a smooth, narrow pipe with high precision.
d) Cold-rolled steel pipe: is produced by rolling a sheet of hot-rolled steel on a cold rolling machine, producing a smooth, narrow and high precision pipe.
4. Materials
4.1 General requirements
The materials and parameters for the production of the steel pipes are stipulated in the relevant standards identified in clause 2.
4.2 Steel grade and chemical composition
The steel grade and chemical composition shall meet the requirements of GB 222, GB 699, GB 700 and GB/T 8163-1992.
4.3 Mechanical properties
The steel pipes must meet the minimum mechanical properties in GB 222, GB 699, GB 700 and GB/T 8163-1992.
5. Manufacturing
The steel pipes shall be manufactured using the technology specified in the relevant standards identified in clause 2.
6. Inspection and testing
6.1 Quality inspection
The quality of the steel pipes shall be inspected in accordance with the relevant standards identified in clause 2.
6.2 Test methods
The tests on the steel pipes shall be conducted in accordance with the relevant standards identified in clause 2.
7. Inspection documents
The inspection documents, including product test reports, shall be delivered to the customer.
8. Delivery state
8.1 Generally, the steel pipes shall be delivered in the original sealed package in accordance with the specifications specified in the relevant standards.
8.2 Delivery state:
The delivery state for the steel pipes shall be specified in the contract or agreement between the customer and the manufacturer.
9. Marking, packaging and transportation
The marking, packaging and transportation of the steel pipes shall be according to the relevant standards (GB 222, GB 699, GB 700 and GB/T 8163-1992).
In conclusion, the requirements and delivery states of the seamless steel pipes used in high pressure fertilizer equipment are specified in GB 6479-2000. It covers the materials, manufacturing, inspection and testing, inspection documents, delivery state, marking, packaging and transportation of the steel pipes. It also stipulates that the quality inspection, testing and inspection documents shall meet the requirements of the relevant standards.
