Technical references and common questions on steel fabrication and machining, updated as we go.
Weld requirements and tolerances on the drawings, material grade and applicable standard, surface treatment (blasting / painting) and packing and shipping conditions.
EN 1090 is the European execution standard for steel structures; ISO 3834 is the welding quality management standard. Both are held by certified factories, which produce under those systems.
Material, tolerance class, surface treatment, batch size and lead time. Drawing completeness directly affects how fast and how accurately we can quote.
Balance the load environment (strength), corrosion requirement (coating or material) and applicable standard (GB / EN / ASTM equivalents). Send the requirement and we will help match it.
PDF, DWG, DXF and STEP are all acceptable; a 3D model further reduces ambiguity in communication.
It depends on process complexity and quantity. For standard steel structures and machined parts, a firm schedule is given once drawings and quantities are confirmed, with milestone updates during production.
The details that actually cause trouble in vacuum fabrication, by topic
Most thin-wall chamber distortion comes from weld sequence and restraint. Symmetric welding, backstep, allowance and post-weld correction in practice.
Read more →The knife edge is not a chamfer — it cold-welds the copper gasket. Face flatness, edge angle, protection and common failure causes.
Read more →Depth sets compression, width sets fill ratio, bottom roughness decides whether gas creeps through — inspect all three.
Read more →Dirty parts deliver oil and particles into your vacuum system. The cleaning sequence, packing practice and a five-point inspection list.
Read more →