Hİ ALL,
i work with EN 1090. i have questions about en 1090 standard.

Q1) in en 1090 cl7.5.7 tack weld length, standard say tack weld length shall be 50 mm and smaller tack weld than 50 mm is satisfactory if it is tested. Which test we do? pqr or additional test pieces? i didnt understand the standard clause. it is not obvious.

Q2) cruciform tensile test: in 1090 says that for transverse fillet weld test need cruciform tensile test. do we need additional test piece or pqr test piece? besides which joint type need cruciform tensile test? how do we understand transverse fillet weld? from techinical specification or drawings or execution?

Q3) 15614 says that for all positions qualification we need to 2 impact or hardness  test  piece from high and low heat input positions. but in t-joint, we cant do impact test. the standard says shall be made impact test from high heat input position. how do we qualify all positions at t-joint?

Q4) during root gap and root face and weld groove angle checking, what is the reference of the control? pqr, wps or standards (en 9692)?which one is first reference?