1. Standard: BS4504
                                    2. Type: Threaded Flange, Screwed Flange (Raised   Face)
                                      3. Pressure: PN6, PN10, PN16, PN25, PN40
                                        4. Size: NB15 - NB1000, larger Sizes available on request
                                          5. 
                                          Raw Material: A105
                                            6. Process: Forged, Stamped
                                            
7. Basic requirements for Material and Flange