Steel Services – General Boiler Plate Requirements
|
Our services:
shipping services | steel services | other services |
|
|
In this section:
home | tests | stock levels mill orders | origin | packing general boiler plate requirements cutting & profiling | certification |
Most of our steel is delivered in accordance with ASTM A20 which sets out the general requirements for pressure vessel plate.
Certain of these requirements are summarised below.
Quality
Steel pates should not be damaged and should have a ‘workmanlike finish’.
Surface imperfections should be removed by the manufacturer. Limits are set on various edge imperfections and weld repairing is only permitted with the permission of the purchaser.
Marking
Plates have to be marked with:
The steel grade, type and class i.e. A387 grade 12 Class 2
Heat number
Plate identifier
Name, brand or logo of the mill
If a plate needs heat treatment but has not been heat treated it needs to be marked ‘G’. If it needs heat treatment and has been heat treated it needs to be marked ‘MT’.
Mass
The standard makes the assumption that the mass factor is 0.785. All plates sold by Oakley Steel have a mass factor of 0.8 in accordance with European customary practice.
Supplementary Requirements
There are a number of additional supplementary requirements for A516 and A387. Some of these can only be met at the time of manufacturing – for example S1 and whether we are able to fulfil your requirements depends on the plates that we have in available or which are due in. Other requirements such as S5 and S8 can be met on request.
| Supplementary Requirement | A516 | A387 |
| S1 | X | X |
| S2 | X | X |
| S3 | X | X |
| S4.1 | X | X |
| S5 | X | X |
| S6 | X | X |
| S7 | X | X |
| S8 | X | X |
| S9 | X | X |
| S11 | X | X |
| S12 | X | X |
| S17 | X | X |
| S53 | X | |
| S54 | X | |
| S60 | X | |
| S62 | X |
S1 – Vacuum Treatment
Vacuum treatment requires that the manufacturing process includes vacuum degassing whilst the steel is molten.
S2 – Product Analysis
Analysis made of each plate as rolled.
S3 – Simulated PWHT
Prior to testing the test samples shall be heated treated to simulate PWHT. The tests have to meet the normal product acceptance criteria.
S4 – Additional Tension Test
Taken from the far end of the plate to the first sample.
S5 – Charpy V–Notch Impact Test
The Charpy V–Notch Impact Test breaks the prepared sample with a single impact.
S6 – Drop Weight Test
This determines the temperature at which the steel ceases to be ductile and becomes brittle – shattering like glass.
S7 – High Temperature Tension Test
A high temperature tension test is a tension test on each plate or heat at elevated temperatures.
S8 – Ultrasonic Examination
Examination of the plate ultrasonically.
S9 – Magnetic particle examination
S11 – Ultrasonic Examination
Examination of steel plates ultrasonically as a supplement to S8.
S12 – Ultrasonic Examination
Examination of steel plates ultrasonically where the plates are going to be used for special applications.
S17 – Vacuum Carbon–Deoxidised Steel
S53 – Tensile and Impact Testing Samples
Allows for the samples to be selected from the mid-thickness of each plate.
S54 – Additional requirements for hydrofluoric acid alkylation service
S60 – Restricted Carbon
Maximum Carbon content of Grade 5 to be 0.1%.
S62 – Temper Embrittlement
Restriction of Silicon, Manganese, Phosphorus and Tin in the chemical composition of the steel.
S63 – Impact Properties after Step Cooling
Comparison of the 55J temperature transitions before and after step cooling.
Quality steel supplied for:
oil & gas, petrochemical & process,construction & shipbuilding industries
General Bolier Plate Requirements | Packing | Cutting & Profiling | Certification
