Place of Origin:
CHINA
Brand Name:
YUHONG
Certification:
ISO 9001-2015
Model Number:
ASME SA387 GR.11 CL2
ASME SA387 Gr.11 Cl2 Baffle Plate For Petroleum refining Hydrogenation Reactor
ASME SA387 Gr.11 Cl.2 Baffle Plate is a chromium-molybdenum alloy steel (1.25Cr-0.5Mo) special plate for pressure vessels.
Its chemical composition is based on low carbon (C≤0.15%), chromium (1.0-1.5%), and molybdenum (0.45-0.65%).
It is mainly used for internal baffles (Baffle Plate) of high-temperature pressure vessels such as oil refining and chemical industry.
It improves the stability of equipment by guiding fluid flow, supporting tube bundles and reducing vibration. It needs to be preheated and welded during manufacturing and combined with post-weld heat treatment (620-650°C). At the same time, it avoids wet hydrogen sulfide environment to reduce corrosion risks. It is a key material for balancing high-temperature strength and economy.
Fluid guidance and distribution: Through a reasonably designed baffle structure, the fluid (gas/liquid) flow path is forced to change, short circuit or retention is avoided, and the heat transfer or reaction efficiency is improved.
Tube bundle support and vibration prevention: Fix the tube bundle in the heat exchanger to reduce fatigue damage caused by fluid induced vibration (FIV) and extend the life of the equipment.
Thermal stress buffering: Under high temperature conditions (≤595°C), the excellent creep resistance of the material is used to alleviate the local thermal stress concentration caused by temperature gradient.
Enhanced structural stability: As an internal support skeleton, it prevents the shell from deforming due to pressure fluctuations or external loads and ensures the integrity of the seal.
Anti-erosion protection: In equipment containing particles or high-speed fluids, baffles can disperse impact energy and reduce the risk of erosion in key areas (such as pipe nozzles and welds).
Equivalents
| BS | EN | ASTM/ASME | DIN |
| 621 B | ––– | SA387-11-2 | ––– |
Specifications for ASME SA387 Grade 11 Alloy Steel Plates
| Designation | Nominal Chromium Content (%) |
Nominal Molybdenum Content (%) |
| SA387 Grade 11 | 1.25% | 0.50% |
Tensile Requirements for ASME SA387 Grade 11 Alloy Steel Plates Class 2 Plates
| Designation: | Requirement: | Grade 11 |
| SA387 Grade 11 | Tensile strength, ksi [MPa] | 75 to 100 [515 to 690] |
| Yield strength, min, ksi [MPa]/(0.2% offset) | 43 [310] | |
| Elongation in 8 in. [200mm], min % | 18 | |
| Elongation in 2 in. [50mm], min, % | 22 | |
| Reduction of area, min % | ––– |
Application
1. Petroleum refining
Hydrogenation reactor
2. Chemical and coal chemical industry
Synthetic ammonia reactor
3. Power and energy
High-temperature steam heat exchanger
Nuclear power plant auxiliary system
4. Other industrial fields
LNG liquefaction unit
Biomass energy reactor
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