GB-T14976 Stainless Steel Pipe For Fluid Transportation
- GB-T14976
- China
- Stock
GB-T14976 This standard specifies the dimensions, shape, technical requirements, test methods, inspection rules, packaging, signs and certificate of the stainless steel seamless steel pipe for fluid transportation.
GB-T14976 Stainless Steel Pipe For Fluid Transportation
GB-T14976 Stainless Steel Seamless Pipe For Fluid Transportation
Scope
This standard specifies the dimensions, shape, technical requirements, test methods, inspection rules, packaging, signs and certificate of the stainless steel seamless steel pipe for fluid transportation.
This standard applies to stainless steel seamless pipe for fluid transportation
Manufacture
Steel pipes are divided into two categories according to product processing methods.
The categories and codes are: hot rolled steel pipes (WH) and cold drawn steel pipes (WC).
The categories and codes are: hot rolled steel pipes (WH) and cold drawn steel pipes (WC).
Steel pipes are divided into two grades according to their size: ordinary grade (PA) advanced (PC)
GB/T14976 Stainless Steel Seamless Steel Pipe Quick Details
Product Name：Stainless Seamless Steel Pipe
Company Name: beite steel pipe( China)
Outside Diameter：21mm——219mmCompany Name: beite steel pipe( China)
Wall thickness：3mm——15mm
Length：6000mm、or specified length as required.
FOB Price: US $1521-3600 / Ton | 1 Ton/Tons (Min. Order)
Port of Shipment：Tianjin,China
Payment：L/C or T/T
Delivery: 7-15 days after payment
Package：Standard export package,suit for all kinds of transport, or as required
Certificate：ISO 9001-2000,PED 97/23/EC,ASME,DNV
Steel pipes are generally delivered in normal length, usually in length as follows
Hot rolled steel pipe: 2 000 mm~12 000 mm;
Cold drawn steel pipe: 1 000 mm to 10 500 mm.
Dimension tolerance for GB/T14976 stainless steel seamless steel pipe
Table 1 Outer diameter and wall thickness tolerance of GB/T14976
| Hot rolled steel pipe | Cold drawn steel pipe | ||||||
| Size/mm | Tolerance /mm | Size /mm | Tolerance /mm | ||||
| PA | PC | PA | PC | ||||
| OD | 68 ≤ OD ≤ 159 | ± 1.25 |
± 1 |
OD |
6 ≤ OD < 10 | ± 0.20 | ± 0.15 |
| 10 ≤ OD ≤ 30 | ± 0.30 | ± 0.20 | |||||
| 159<OD ≤ 426 | ± 1.5 | 30<OD ≤ 50 | ± 0.40 | ± 0.30 | |||
| OD>5 | ± 0.9% | 0.8% | |||||
| ±WT |
<15 |
+15 -12.5 |
± 12.5 |
WT | ≤ 3 |
± 14% |
+12% -10% |
| ≥ 15 |
+20 -15 |
>3 |
+12% -10% |
± 10% | |||
Table 2 length tolerance of GB/T14976
| Tolerance level | Tolerance(mm) |
| L1 | 0——20 |
| L2 | 0——10 |
| L3 | 0——5 |
| Note: The tolerance level is not indicated in the contract and is performed according to the tolerance class L1. | |
Glutinous rice curvature
The bend per meter of steel pipe shall not be greater than the following: '
Wall thickness <15 mm, 1. 5 mm/m
Wall thickness >15 mm, 2. 0 mm/m
Thermal expansion tube 3. 0 mm/m.
Tip shape
The end faces of the steel pipe should be perpendicular to the axis of the steel pipe and the burrs should be removed.
Chemical composition of GB/T14976 stainless steel seamless steel pipe
Mechanical properties of GB/T14976 stainless steel seamless steel pipe
σb:Tensile strength
σ0.2:Yield Strength
δ5:Elongation
Chemical composition of GB/T14976 stainless steel seamless steel pipe
Table 2 Chemical compositions of GB/T14976
Mechanical properties of GB/T14976 stainless steel seamless steel pipe
Table 4 Mechanical properties of GB/T14976
σb:Tensile strength
σ0.2:Yield Strength
δ5:Elongation
Items of Testing
Hydraulic test
The steel pipe shall be hydraulically tested one by one.
Flattening test
Steel tubes with a wall thickness of not more than 10 mm shall be subjected to a flattening test, and cracks and cracks shall not be allowed after the sample is flattened.
Flaring test
A steel pipe having a wall thickness of less than or equal to 10 mm can be subjected to a flare test. The top taper of the flare test is 30', 45. Or 60. One of them, the expansion of the outer diameter after the flare is 100,.. After the flare, the specimen shall not have cracks or cracks.
Intergranular corrosion test
Austenitic and austenitic-ferritic steel tubes can be tested for intergranular corrosion.
The intergranular corrosion test method is in accordance with the provisions of GB/T 434.1-43. The specific corrosion test method is agreed by the supplier and the buyer and stated in the contract. If it is not clear, it shall be carried out in accordance with the test of GB/T434.5.
Surface Quality
The inner and outer surfaces of the steel pipe shall be free of cracks, folds, rolling, separation and crusting. These defects shall be completely removed and the depth of removal shall not exceed the negative deviation of the nominal wall thickness. The actual wall thickness at the cleaning site shall not be less than the minimum allowed by the wall thickness.
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