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Welder check.

May the PERSON weld — the welder range of qualification per EN ISO 9606-1: the ISO designation, the range table and a weld check against the welder. Whether the weld is covered by a procedure (WPQR) — see Weld check.

Test piece

Step 1: enter the test piece (what the welder welded in the test) — on the right you get the ISO designation and the range table. Step 2: on the tab, check whether this qualification (or your welders) covers a specific production weld.

Process

Form

Weld type

Joint detail (backing)

Parent material (non-essential variable)

Second parent material (for a dissimilar joint)

Filler material group (FM)

Filler material type

Filler material

Deposited thickness s (mm)

Metal transfer (§5.2)

Short-circuiting (dip) Globular Spray Pulsed

Welding position

Fillet welds (§5.4)

Split coupon: root / remainder (multi-process or root in a different welding position)

Designation and range

ISO 9606-1 135 P BW FM1 S s10 PE ss nb

Variable	Test piece	Range of qualification ▸ valid	Reference
Process	135	135, 138	§5.2 / Tab.1
Product type	P	plate, pipe	§5.3
Type of weld	BW	BW	§5.4
Filler material group	FM1	FM1, FM2	§5.5 / Tab.3
Filler material type	S	S, M	§5.6 / Tab.4,5
Parent material group	1	recorded — range set by the FM group (§5.5)	§5.5
Thickness	10	3 – 20	§5.7 / Tab.6,8
Pipe diameter	—	pipe D ≥ 500 (fixed) · D ≥ 75 (rotating, PA/PB/PC/PD)	§5.3 b/c
Welding position	PE	PA, PC, PE	§5.8 / Tab.9,10
Weld details	ss-nb	ss-nb, ss-mb, bs, ss-gb, ss-fb	§5.9 / Tab.11,12

The parent material is a non-essential variable — it is recorded on the certificate but does not limit the range: per the standard the welder is qualified for groups 1–11 (all steels). The only exception is 142/311 without filler material (limited to the main group of the test piece — a note in the standard). What really limits is the filler material group (FM, Tab. 3) and its type (Tab. 4/5): FM1, for example, covers only FM1 and FM2, so stainless steel cannot in practice be welded (it requires FM5).

Prokon made with Weldmaster · prokon.si

Frequently asked questions

What determines a welder’s range of qualification?

Under EN ISO 9606-1 the range is set by the welding process, product type (plate or pipe), weld type (butt or fillet), filler material group, test-piece thickness or diameter, welding position and technique (single-sided with or without backing, double-sided). The tool derives the range table from the test piece to the standard.

How long is a welder’s certificate valid?

The qualification is confirmed by a signature every 6 months (EN ISO 9606-1 §9.2). Prolongation follows §9.3: a retest every 3 years, or 2 years based on production quality records, or without time limit when the quality-system conditions are met. The tool shows the confirmation and expiry dates.

What does a designation like 135 P BW FM1 S s10 PA ss nb mean?

The tool builds the designation to EN ISO 9606-1 §5.2, Table 1: 135 is the process (ISO 4063), P plate, BW butt weld, FM1 filler material group, S solid wire, s10 deposited thickness, PA position, ss single-sided, nb no backing. Each part of the designation has its own range in the table.